It is common in technical writing to abbreviate complex technical terms by combining the first letters. The resulting abbreviations are often called acronyms. Editorial guidelines for the RFC series generally require expansion of these abbreviations on first occurrence in a title, in an abstract, or in the body of the document.
The RFC Editor attempts to keep the use of abbreviations consistent and to point out conflicts to authors. For this purpose, we have built the abbreviation list below. This list contains abbreviations appearing in RFCs and often reflects discussions with authors, WG chairs, and/or ADs. There is no claim of completeness. Note that some abbreviations have multiple expansions.
Some abbreviations are so well known that expansion is probably unnecessary. The RFC Editor exercises editorial judgment about whether a particular use of one of the “well-known” abbreviations requires expansion. (For example, strict adherence to the expansion requirement can lead to impossibly ugly titles.) In the following list of abbreviations, those that are usually (but not necessarily) treated as “well known” are marked with asterisks. However, since there are so many different abbreviations and there is a range of knowledge among RFC readers, we tend to expand abbreviations in case of doubt.
Finally, this list includes some terms that look like abbreviations but are actually fixed names for things, and hence cannot and should not be expanded. These are noted as “No expansion” or “Do not expand”; they are also marked with asterisks.
Note: Names of resource records do not need to be expanded (e.g., NAPTR).
Abbrev | * | Expansion | Notes |
---|---|---|---|
2G | * | Second generation cellular (mobile) (2G) | |
2.5G | * | Enhanced second generation cellular (mobile) (2.5G) | |
3G | * | Third generation cellular (mobile) (3G) | |
3GPP | * | Third Generation Partnership Project | |
3GPP IMS | 3GPP Internet Multimedia System | ||
Third Generation Partnership Project IP Multimedia Subsystem | |||
3PCC | third-party call control (3PCC) | ||
4G | * | 4th Generation Mobile network (mobile) (4G) | |
4rd | IPv4 Residual Deployment (4rd) | ||
5G | * | 5th Generation Mobile network (mobile) (5G) | |
6BBR | 6LoWPAN Backbone Router (6BBR) | ||
6CIO | 6LoWPAN Capability Indication (6CIO) | ||
6CO | 6LoWPAN Context Option (6CO) | ||
6LBR | 6LoWPAN Border Router (6LBR) | ||
6LN | 6LoWPAN Node (6LN) | ||
6LoRH | 6LoWPAN Routing Header (6LoRH) | ||
6LoRHC | 6LoRH Critical (6LoRHC) | ||
6LoRHE | 6LoRH Elective (6LoRHE) | ||
6LoWPAN | * | IPv6 over Low-Power Wireless Personal Area Networks (6LoWPAN) | |
6LR | 6LoWPAN Router (6LR) | ||
6LSA | IPv6 Label Switching Architecture (6LSA) | ||
6P | 6TiSCH Operation Sublayer Protocol (6P) | ||
6PE | IPv6 Provider Edge (6PE) | ||
6rd | IPv6 Rapid Deployment on IPv4 Infrastructures | ||
6TiSCH | IPv6 over the TSCH mode of IEEE 802.15.4e (6TiSCH) | ||
6to4-PMT | 6to4 Provider Managed Tunnel (6to4-PMT) | ||
6top | 6TiSCH Operation Sublayer (6top) | ||
A+P | Address plus Port (A+P) | ||
AA | Authoritative Answer (AA) | ||
application agent (AA) | |||
AAA | Authentication, Authorization, and Accounting (AAA) | ||
AAAA | [A DNS record type; not exp.] | ||
AAC | Advanced Audio Coding (AAC) | ||
AAD | additional authenticated data (AAD) | ||
AAE | Active-Active Edge (AAE) | ||
AAH | Abandoning All Hope (AAH) | ||
AAK | Authenticated Anticipatory Keying (AAK) | ||
AAL5 | ATM Adaptation Layer 5 (AAL5) | ||
AAR | AA-Request (AAR) | RFC 4005 | |
ABE | Alternative Backoff with ECN (ABE) | ||
ABFAB | Application Bridging for Federated Access Beyond web (ABFAB) | ||
ABI | application binary interface (ABI) | ||
ABNF | * | Augmented Backus-Naur form | |
ABNO | Application-Based Network Operations (ABNO) | ||
ABR | Area Border Router (ABR) | ||
ABRO | Authoritative Border Router Option (ABRO) | ||
AC | Access Controller (AC) | ||
Attachment Circuit (AC) | |||
Access Category (AC) | |||
ACAP | Application Configuration Access Protocol | ||
ACE | Access Control Entry (ACE) | ||
ASCII Compatible Encoding (ACE) | |||
Authentication and Authorization for Constrained Environments (ACE) | |||
ACH | Associated Channel Header | ||
ACK | * | No expansion | |
ACL | Access Control List (ACL) | ||
ACM | access control model (ACM) | ||
ACME | Automatic Certificate Management Environment (ACME) | ||
ACP | Autonomic Control Plane (ACP) | ||
ACS | Auto Configuration Server (ACS) | ||
ACTN | Abstraction and Control of TE Networks (ACTN) | ||
AD | Authentic Data (bit or flag) (AD) | ||
ADB | Application Data Block (ADB) | ||
ADBN | Application Data Block Number (ADBN) | ||
ADC | analog-to-digital converter (ADC) | ||
ADGoF | Anderson-Darling Goodness-of-Fit (ADGoF) | ||
ADISC | Address Discovery Extended Link Service (ADISC) | Pronounced “ay-disk”. | |
Adj-RIB | * | No expansion | |
ADK | Anderson-Darling K-sample (ADK) | ||
ADM | Add-Drop Multiplexer (as in SONET ADM) | ||
ADMD | ADministrative Management Domain | ||
ADN | Authentication Domain Name (ADN) | ||
ADoT | Authoritative DoT (ADoT) | ||
ADS | Astrophysics Data System (ADS) | ||
ADSL | * | Asymmetric Digital Subscriber Line (ADSL) | |
ADSP | Author Domain Signing Practices (ADSP) | ||
ADU | Application Data Unit (ADU) | ||
ADUI | Application Data Unit Information (ADUI) | ||
AEAD | Authenticated Encryption with Associated Data (AEAD) | ||
AEC | Acoustic Echo Cancellation (AEC) | ||
AERO | Asymmetric Extended Route Optimization (AERO) | ||
AES | * | Advanced Encryption Standard (AES) | |
AF | Assured Forwarding (as in “Diffserv AF”) | ||
Address Family (AF) | |||
Appointed Forwarder (AF) | |||
AFBR | Address Family Border Router (AFBR) | ||
AFI | * | Address Family Identifier (AFI) | |
AFN | Address Family Number | ||
AfriNIC | * | African Network Information Center | |
AFRF | Authentication Failure Reporting Format (AFRF) | ||
AFS | * | Authentication File System | Typically not expanded. |
AFTR | Address Family Transition Router (AFTR) | ||
AG | Administrative Group (AG) | ||
AGC | Automatic Generation Control (AGC) | ||
AGI | Attachment Group Identifier | ||
AGN | aggregation node (AGN) | ||
AH | Authentication Header (AH) | ||
AHS | Additional Header Segment (AHS) | ||
Adaptive HTTP Streaming (AHS) | |||
AIA | Authority Information Access (AIA) | ||
AIMD | Additive Increase Multiplicative Decrease (AIMD) | ||
AIS | Alarm Indication Signal (AIS) | ||
AKA | Authentication and Key Agreement (AKA) | ||
AMI | Advanced Metering Infrastructure (AMI) | ||
AMR | Automatic Meter Reading (AMR) | ||
AMT | Automatic Multicast Tunneling (AMT) | ||
AKM | Authentication and Key Management (AKM) | ||
ALC | Asynchronous Layered Coding (ALC) | ||
ALG | Application Level Gateway (ALG) | ||
Application Layer Gateway (ALG) | |||
ALOC | Area Locator (ALOC) | ||
ALPN | Application-Layer Protocol Negotiation (ALPN) | ||
ALT | Alternative Logical Topology (ALT) | ||
ALTO | Application-Layer Traffic Optimization (ALTO) | ||
AMEI | Association of Musical Electronics Industry (AMEI) | ||
AMID | Additive Increase Multiplicative Decrease (AMID) | ||
AMR | Adaptive Multi-Rate (AMR) | ||
AMR-WB | Adaptive Multi-Rate - WideBand (AMR-WB) | ||
AMS | authoritative mapping server (AMS) | ||
AMSS | Advanced Mobile Station Software (AMSS) | ||
AN | Access Node (AN) | ||
ANAT | Alternative Network Address Types (ANAT) | ||
ANCP | Access Node Control Protocol (ANCP) | ||
ANDSF | Access Network Discovery and Selection Function (ANDSF) | ||
ANE | Abstract Network Element (ANE) | ||
ANG | Access Network Gateway (ANG) | ||
ANI | Access Network Identifier (ANI) | ||
Autonomic Networking Infrastructure (ANI) | RFC 8994 | ||
ANIMA | Autonomic Networking Integrated Model and Approach (ANIMA) | ||
ANM | Authentic Neighbours Memory (ANM) | ||
Adaptive Network Management (ANM) | |||
ANR | Access Network Router (ANR) | ||
ANSI | American National Standards Institute | ||
ANSN | Advertised Neighbor Sequence Number (ANSN) | ||
AODV | Ad hoc On-Demand Distance Vector (AODV) | ||
AOR | address of record (AOR) | ||
AP | Access Point (AP) | ||
Authenticating Party (AP) | |||
API | * | Application Programming Interface | |
APM | Application Performance Measurement (APM) | ||
APN | Access Point Name (APN) | ||
APNIC | * | Asia Pacific Network Information Centre | |
APP | Application-specific functions | ||
APS | Automatic Protection Switching (APS) | ||
AQM | Active Queue Management (AQM) | ||
AR | Address Resolution (AR) | ||
Access Router (AR) | |||
Assisted Replication (AR) | |||
ARAP | Apple Remote Access Protocol (ARAP) | ||
ARF | Abuse Reporting Format (ARF) | ||
ARIN | * | American Registry for Internet Numbers | |
ARL | Authority Revocation List (ARL) | ||
ARM | * | [formerly for Advanced RISC Machine] | |
ARMv4 | * | Advanced RISC Machine version 4 | |
ARO | Access Router Option (ARO) | ||
Address Registration Option (ARO) | |||
ARP | * | Address Resolution Protocol (ARP) | |
ARQ | Automatic Repeat reQuest | ||
AS | Autonomous System (AS) | ||
Applicability Statement (AS) | |||
Authentication Service (AS) | |||
Application Specific (AS) | |||
Application Server (AS) | |||
Authorization Server (AS) | |||
ASA | Autonomic Service Agent (ASA) | ||
ASBR | * | Autonomous System Border Router | |
ASCII | * | American Standard Code for Information Interchange | |
ASE | Autonomous System External (ASE) | ||
amplifier spontaneous emission (ASE) | |||
ASIC | Application-Specific Integrated Circuit (ASIC) | ||
ASLA | Application-Specific Link Attribute (ASLA) | ||
ASM | * | Any-Source Multicast (ASM) | |
address-sharing mechanism (ASM) | |||
ASN | Access Service Network (ASN) | ||
Autonomous System Number (ASN) | |||
ASN.1 | * | Abstract Syntax Notation One | |
ASNGW | Access Service Network Gateway (ASNGW) | ||
ASON | Automatically Switched Optical Network | ||
ASP | Application Service Provider (ASP) | ||
ASR | Automatic Speech Recognition (ASR) | ||
ATA | Analog Telephone Adaptor (ATA) | ||
ATD | Activation Time Delay (ATD) | ||
ATM | * | Asynchronous Transfer Mode (ATM) | |
* | Automatic Teller Machine (ATM) | ||
ATO | arrival time offset (ATO) | ||
ATPS | Authorized Third-Party Signatures (ATPS) | ||
ATT | Attribute Protocol (ATT) | ||
ATU | ADSL Transceiver Unit (ATU) | ||
AU | Access Unit (AU) | ||
AUID | Agent or User Identifier (AUID) | ||
AVA | Attribute Value Assertion (AVA) | ||
AVB | Audio Video Bridging (AVB) | ||
AVP | attribute-value pair (AVP) | ||
* | Audio-Visual Profile (AVP) | ||
AVPF | * | Audio-Visual Profile with Feedback (AVPF) | |
AVT | Audio/Video Transport | ||
AWG | Arrayed Waveguide Grating (AWG) | ||
AXFR | Authoritative Transfer | not full zone transfer or Asynchronous Full Transfer | |
AXoT | AXFR over TLS (AXoT) | ||
B-ISDN | Broadband Integrated Services Digital Network (B-ISDN) | ||
B-MAC | Backbone MAC (B-MAC) | ||
B-VID | Backbone VLAN ID | ||
B-VLAN | Backbone VLAN | ||
B2BUA | back-to-back user agent (B2BUA) | ||
B4 | Basic Bridging BroadBand (B4) | ||
BA | Behavior Aggregate (BA) | ||
Block Ack (BA) | |||
BAB | Bundle Authentication Block (BAB) | ||
BACP | Bandwidth Allocation Control Protocol (BACP) | ||
Bonding Aggregation Control Protocol (BACP) | |||
BAR | Block Ack Request (BAR) | ||
BAS | Broadband Access Switch (BAS) | ||
building automation system (BAS) | |||
bash | Bourne-Again SHell (bash) | ||
BB | Bottleneck Bandwidth (BB) | ||
BBF | Broadband Forum (BBF) | ||
BC | Boundary Clock (BC) | ||
BCB | Backbone Core Bridge (BCB) | ||
lock Confidentiality Block (BCB) | |||
BCC | Bonding Communication Channel (BCC) | ||
BCD | Binary Coded Decimal (BCD) | ||
BCE | Bonding Channel Entity (BCE) | ||
BCH | * | Bose, Ray-Chaudhuri, Hocquenghem | Typically not expanded; as in “BCH code” |
BCP | * | Best Current Practice | should only be expanded for introductory docs |
Bridging Control Protocol (BCP) | |||
BD | Broadcast Domain (BD) | ||
BDN | Broadcast Domain Name (BDN) | ||
BDP | Bandwidth-Delay Product (BDP) | ||
BDS | * | Buchmann, Dahmen, Schneider | name of an algorithm |
BE | best-effort (BE) | ||
BEB | Backbone Edge Bridge (BEB) | ||
BECN | Backward Explicit Congestion Notification (BECN) | ||
BEEP | Blocks Extensible Exchange Protocol (BEEP) | ||
BEET | Bound End-to-End Tunnel (BEET) | ||
BEK | bundle encryption key (BEK) | ||
BER | * | Basic Encoding Rules | |
bit error rate (BER) | |||
BERT | Block-wise Extension for Reliable Transport (BERT) | ||
BEX | Base Exchange (BEX) | ||
BFCP | Binary Floor Control Protocol (BFCP) | ||
BFD | Bidirectional Forwarding Detection (BFD) | ||
BFER | Bit-Forwarding Egress Router (BFER) | ||
BFIR | Bit-Forwarding Ingress Router (BFIR) | ||
BFR | Bit-Forwarding Router (BFR) | ||
BGP | * | Border Gateway Protocol | |
BGP ORR | BGP Optimal Route Reflection (BGP ORR) | ||
BGP-LS | Border Gateway Protocol - Link State | ||
BGPsec | Typically not expanded | ||
BHS | Basic Header Segment (BHS) | ||
BIA | Bump-in-the-API (BIA) | ||
BIB | Block Integrity Block (BIB) | ||
BIC-TCP | Binary Increase Congestion Control (BIC-TCP) | ||
BIDIR-PIM | Bidirectional PIM (BIDIR-PIM) | ||
BIER | Bit Index Explicit Replication (BIER) | ||
BIER-TE | Tree Engineering for Bit Index Explicit Replication (BIER-TE) | ||
BIFT | Bit Index Forwarding Table (BIFT) | ||
BIH | Bump-in-the-Host (BIH) | ||
BIND/BIND9 | * | Berkeley Internet Name Domain (BIND) | No expansion |
BIOS | * | Basic Input/Output System | |
BIRD | * | BIRD Internet Routing Daemon | |
BIRT | Bit Index Routing Table (BIRT) | ||
BIS | Bump-in-the-Stack (BIS) | ||
BITS | Building Integrated Timing Supply (BITS) | ||
BLA | Bridged Line Appearance (BLA) | ||
BLE | Bluetooth Low Energy (BLE) | ||
BM | Broadcast and Multicast (BM) | ||
BMI | Base MPLS Imposition (BMI) | ||
BMP | BGP Monitoring Protocol (BMP) | ||
BMR | Basic Mapping Rule (BMR) | ||
BMS | Building Management Systems (BMS) | ||
BN | Bundle Node (BN) | ||
Boundary Node (BN) | |||
BNC | Branch Node Capability (BNC) | ||
BNF | * | Backus-Naur form | |
BNG | Broadband Network Gateway (BNG) | ||
BOF | * | Birds of a Feather | |
BOM | Byte Order Mark (BOM) | ||
BOSH | Bidirectional-streams Over Synchronous HTTP (BOSH) | ||
BP | Bundle Protocol (BP) | ||
bit position (BP) | |||
BPA | bundle protocol agent (BPA) | ||
BPDU | Bridge PDU (BPDU) | ||
BPSec | Bundle Protocol Security (BPSec) | ||
BR | Border Router (BR) | ||
BRAS | Broadband Remote Access Server (BRAS) | ||
BRDP | Border Router Discovery Protocol (BRDP) | ||
BRI | Basic Rate Interface (BRI) | ||
BRPC | Backward Recursive PCE-Based Computation (BRPC) | ||
BRSKI | Bootstrapping Remote Secure Key Infrastructure (BRSKI) | ||
BS | Base Station (BS) | ||
BSC | Base Station Controller (BSC) | ||
BSD | * | Do not expand | name of operating system; better known by acronym |
BSL | BitStringLength (BSL) | ||
BSM | Bootstrap Message (BSM) | ||
BSO | Basic Security Option (BSO) | ||
BSP | Bundle Security Protocol (BSP) | ||
BSR | Bootstrap Router (BSR) | ||
bSPL | Base Special Purpose Label (bSPL) | ||
BSS | Business Support Systems (BSS) | ||
Basic Service Set (BSS) | |||
Base Station System (BSS) | |||
BSSID | Basic Service Set Identifier (BSSID) | ||
BT | Bridge Table (BT) | ||
BTC | Bulk Transfer Capacity (BTC) | ||
Bulk Transport Capacity (BTC) | |||
BTLE | Bluetooth Low Energy (BTLE) | ||
BTMM | Back to My Mac (BTMM) | ||
BTS | Base Tranceiver Station (BTS) | ||
BTU | Bonding Transmission Unit (BTU) | ||
BUM | Broadcast, Unknown Unicast, and Multicast (BUM) | ||
Broadcast, Unknown Unicast, or Multicast (BUM) | |||
BVT | Bit-rate Variable Transponder (BVT) | ||
BW | Bandwidth (BW) | ||
BWS | “bad” whitespace (BWS) | ||
C-DNS | Compacted-DNS (C-DNS) | ||
C-MAC | customer MAC | ||
C-PCE | Child PCE | ||
C-VLAN | Customer VLAN (C-VLAN) | ||
C2 | Command and Control (C2) | ||
C2P | customer-to-provider (C2P) | ||
CA | certification authority (CA) | preferred expansion | |
certificate authority (CA) | |||
cryptographic authentication (CA) | |||
CAA | Certification Authority Authorization (CAA) | ||
CAB | Converged Address Book (CAB) | ||
Content After Beacon (CAB) | |||
CAC | Connection Admission Control (CAC) | ||
CAdES | CMS Advanced Electronic Signatures (CAdES) | ||
CAEK | content-authenticated-encryption key (CAEK) | ||
CAID | Calculation Algorithm ID (CAID) | ||
CalDAV | Calendaring Extensions to WebDAV (CalDAV) | ||
CALIPSO | Common Architecture Label IPv6 Security Option (CALIPSO) | ||
CALS | Computer-Aided Acquisition and Life-Cycle Support (CALS) | ||
CAM | Content Addressable Memory (CAM) | ||
captcha | * | Do not expand | |
CAP | Candidate Access Point (CAP) | ||
CAPWAP | Control and Provisioning of Wireless Access Points (CAPWAP) | ||
CAPEX | Capital Expenditure (CAPEX) | ||
CAR | Committed Access Rate (CAR) | ||
CARD | Candidate Access Router Discovery (CARD) | ||
CAT-iq | Cordless Advanced Technology - internet and quality (CAT-iq) | ||
CATNIP | Common Architecture for Next Generation Internet Protocol (CATNIP) | ||
CAVE | Cellular Authentication and Voice Encryption (CAVE) | ||
CBC | Cipher Block Chaining (CBC) | ||
CBC-MAC | Cipher Block Chaining Message Authentication Code (CBC-MAC) | ||
CBHE | Compressed Bundle Header Encoding (CBHE) | ||
CBID | Crypto-Based Identifier (CBID) | ||
CBOR | Concise Binary Object Representation (CBOR) | ||
CBQ | Class-Based Queuing (CBQ) | ||
CBR | Constant Bitrate (CBR) | ||
CC | Continuity Check (CC) | ||
CSRC count (CC) | |||
Call Completion (CC) | |||
Call Control (CC) | |||
CC-V | Continuity Check and Connectivity Verification (CC-V) | ||
CCA | Congestion Control Algorithm (CCA) | ||
CCC | CMS Content Constraint (CCC) | ||
CCDR | Centralized Control Dynamic Routing (CCDR) | ||
CCE | Call-Completion Entity (CCE) | ||
CCID | Congestion Control Identifier (CCID) | ||
Content Collection IDentifier (CCID) | |||
CCM | Counter with CBC-MAC (CCM) | ||
Codec Control Messages (CCM) | |||
Continuity Check Message (CCM) | |||
CCMP | Counter Mode with CBC-MAC Protocol (CCMP) | ||
Centralized Conferencing Manipulation Protocol (CCMP) | |||
CCN | Content-Centric Networking (CCN) | ||
CCNL | Call Completion on Not Logged-in (CCNL) | ||
CCNR | Call Completion on No Reply (CCNR) | ||
CCNx | Content-Centric Networking (CCNx) | ||
CCS | Change Cipher Spec (CCS) | ||
coded character set (CCS) | |||
ccTLD | Country Code Top-Level Domain (ccTLD) | ||
CCV | Common Communication Vehicle (CCV) | ||
CCXML | Call Control XML (CCXML) | ||
CD | Congestion Degree | ||
CDA | Compression/Decompression Action (CDA) | ||
CDDL | Concise Data Definition Language (CDDL) | ||
CCDR | Centralized Control Dynamic Routing (CCDR) | ||
CDF | Comma-Delimited Format (CDF) | ||
cumulative distribution function (CDF) | |||
CDH | computational Diffie-Hellman (CDH) | ||
CDMA | * | Code Division Multiple Access | |
CDMA2000 | * | No expansion | It is a registered trademark of the Telecommunications Industry Association in the US. |
CDMF | * | Commercial Data Masking Facility | |
CDMI | Cloud Data Management Interface (CDMI) | ||
CDN | Call-Disconnect-Notify (CDN) | ||
Content Delivery Network (CDN) | |||
Content Distribution Network (CDN) | |||
Chinese Domain Name (CDN) | |||
CDNI | Content Distribution Network Interconnection (CDNI) | ||
Content Delivery Network Interconnection (CDNI) | |||
CDP | Content Delivery Protocol (CDP) | ||
CRL Distribution Point (CDP) | |||
CDR | Call Data Record (CDR) | ||
CDRR | Current Data Rate (Receive) (CDRR) | ||
CDRT | Current Data Rate (Transmit) (CDRT) | ||
CE | Customer Edge (CE) | ||
Control Element (CE) | |||
Congestion Experienced (CE) | |||
CEA | Capabilities-Exchange-Answer (CEA) | ||
Consumer Electronics Association (CEA) | |||
CEID | Control Element ID (CEID) | ||
CEK | content-encryption key (CEK) | ||
CELP | Code-Excited Linear Prediction (CELP) | ||
CELT | Constrained-Energy Lapped Transform (CELT) | ||
CEMA | Connection Establishment for Media Anchoring (CEMA) | ||
CEP | Circuit Emulation over Packet (CEP) | ||
CERT | * | Computer Emergency Response Team (CERT) | |
CES | Circuit Emulation Service (CES) | ||
Core-Edge Separation (CES) | |||
CESoPSN | Circuit Emulation Service over Packet Switched Network (CESoPSN) | ||
CFB | Cipher FeedBack (CFB) | ||
CFG | context-free grammar (CFG) | ||
CFI | Canonical Format Indicator (CFI) | ||
CFM | Connectivity Fault Management (CFM) | ||
CFWS | comments and/or folding white space (CFWS) | ||
CGA | Cryptographically Generated Addresses (CGA) | ||
CGI | Common Gateway Interface (CGI) | ||
CGN | Carrier-Grade NAT (CGN) | ||
CHAP | Challenge Handshake Authentication Protocol (CHAP) | ||
CHbH | Critical Hop-by-Hop (CHbH) | ||
CHID | Channel Identifier (CHID) | ||
CI | Channel Initiator (CI) | ||
CI/T | CDNI Control interface / Triggers (CI/T) | ||
CIA | Confidentiality, Integrity, and Availability (CIA) | ||
CID | Carousel Instance Descriptor (CID) | ||
Connection Identifier (CID) | |||
Content Identifier (CID) | |||
Context Identifier (CID) | |||
CIDR | Classless Inter-Domain Routing (CIDR) | ||
CIF | Common Intermediate Format (CIF) | ||
CIFS | Common Internet File System (CIFS) | ||
CIID | Carousel Instance IDentifier (CIID) | ||
CIM | Common Information Model (CIM) | ||
CIN | Client Identification Name (CIN) | ||
CIPID | Contact Information in PIDF (CIPID) | ||
CIPSO | Common Internet Protocol Security Option (CIPSO) | ||
Commercial IP Security Option (CIPSO) | |||
CIS | Cryptographic Interoperability Strategy (CIS) | ||
CISC | Complex Instruction Set Computer (or Computing) | ||
CIST | Common and Internal Spanning Tree (CIST) | ||
CItE | Critical Ingress-to-Egress (CItE) | ||
CL | Controlled Load (CL) | ||
CLA | convergence-layer adapter (CLA) | ||
CLAS | Cooperating Layered Architecture for SDN (CLAS) | ||
CLAT | customer-side translator (CLAT) | ||
CLDR | Connectionless Data Response (CLDR) | ||
Common Locale Data Repository (CLDR) | |||
CLE | Congestion Level Estimate (CLE) | ||
CLEI | Common Language Equipment Identifier (CLEI) | ||
CLI | command-line interface (CLI) | ||
Call Level Interface (CLI) | |||
Calling Line Identification (CLI) | |||
CLNP | Connectionless Network Protocol (CLNP) | ||
Connectionless-mode Network Protocol (CLNP) | ISO 8473 | ||
CLNS | Connectionless Network Service (CLNS) | ||
CLP | Cell Loss Priority (CLP) | A flag in an ATM cell | |
CLUE | Controlling Multiple Streams for Telepresence (CLUE) | ||
CM | connection manager (CM) | ||
CMAC | Cipher-Based Message Authentication Code (CMAC) | ||
CMC | Certificate Management over CMS (CMC) | ||
CMCC | Conference and Media Control Client (CMCC) | ||
CMDB | Configuration Management Database (CMDB) | ||
CMP | Certificate Management Protocol (CMP) | ||
CMS | Cryptographic Message Syntax (CMS) | ||
CMT | Coordinated Multicast Trees (CMT) | ||
CMTS | cable modem termination system (CMTS) | ||
CN | Client Node (CN) | ||
correspondent node (CN) | |||
Common Name (CN) | |||
Comfort Noise (CN) | |||
CNAME | * | Canonical Name (CNAME) | |
CNC | Customer Network Controller (CNC) | ||
CNF | Cache-and-Forward (CNF) | ||
CNG | comfort noise generation (CNG) | ||
CNP | Checksum Neutrality Preserver (CNP) | ||
CNSA | Commercial National Security Algorithm (CNSA) | ||
CoA | Care-of Address (CoA) | ||
Change-of-Authorization (CoA) | |||
CoAP | Constrained Application Protocol (CoAP) | ||
CO | Central Office (CO) | ||
Connection Only (CO) | |||
COM | Component Object Module (COM) | ||
COMEDIA | Connection-Oriented Media (COMEDIA) | ||
COMSEC | Communications Security (COMSEC) | ||
CONS | Content distribution Overlay Network Service (CONS) | ||
COPS | Common Open Policy Service (COPS) | ||
CoRAP | Conditional Random Access Point (CoRAP) | ||
CoRE | Constrained RESTful Environments (CoRE) | ||
CORECONF | CoAP Management Interface (CORECONF) | ||
CORS | Cross-Origin Resource Sharing (CORS) | ||
Corba | common object request broker architecture (Corba) | ||
CoS | Class of Service (CoS) | ||
COSE | CBOR Object Signing and Encryption (COSE) | ||
CoSWID | Concise SWID (CoSWID) | ||
CoT | Care-of Test (CoT) | ||
CoTI | Care-of Test Init (CoTI) | ||
CP | Certificate Policy (CP) | ||
CLUE Participant (CP) | |||
CPA | Certification Path Advertisement (CPA) | ||
CPE | Customer Premises Equipment (CPE) | ||
CPIM | Common Presence and Instant Messaging (CPIM) | ||
Common Profile for Instant Messaging (CPIM) | |||
CPL | Call Processing Language (CPL) | ||
CPLD | Complex Programmable Logic Device (CPLD) | ||
CPM | Converged IP Messaging (CPM) | ||
CPP | Common Profile for Presence (CPP) | ||
Connectivity Provisioning Profile (CPP) | |||
CPRI | Common Public Radio Interface (CPRI) | ||
CPS | Certification Path Solicitation (CPS) | ||
Certification Practices Statement (CPS) | |||
CPU | * | Central Processing Unit | |
CR | Carriage Return (CR) | ||
Correspondent Router (CR) | |||
Channel Receiver (CR) | |||
CRC | Cyclic Redundancy Check (CRC) | ||
CR-LDP | Constraint-based Routed LDP (CR-LDP) | ||
CRH | . | Compact Routing Header | RFC 9631 |
CRIME | Compression Ratio Info-leak Made Easy (CRIME) | ||
CRIO | Core Router-Integrated Overlay (CRIO) | ||
CRISP | Cross Registry Internet Service Protocol (CRISP) | ||
CRL | Certificate Revocation List (CRL) | ||
CRLF | * | Carriage-Return Line-Feed | ASCII control character sequence |
CRM | Customer Relationship Management (CRM) | ||
CRMF | Certificate Request Message Format (CRMF) | ||
CRS | Coordinate Reference System (CRS) | ||
CRT | Chinese Remainder Theorem (CRT) | ||
CRUD | Create, Read, Update, Delete (CRUD) | ||
CRUDX | Create, Read, Update, Delete, eXec (CRUDX) | ||
cRTP | compressed RTP (cRTP) | ||
CS | Communication Session (CS) | ||
Class Selector (CS) | |||
Content Store (CS) | |||
CSA | Configured Security Association (CSA) | ||
CSAIL | Computer Science and Artificial Intelligence Laboratory (CSAIL) | ||
CsC | Carriers' Carriers (CsC) | ||
CSG | Cell Site Gateways (CSG) | ||
CSI | Channel State Information (CSI) | ||
CSIRT | Computer Security Incident Response Team (CSIRT) | ||
CSK | Combined Signing Key (CSK) | ||
CSM | Capabilities and Settings Message (CSM) | ||
CSMA/CD | Carrier Sense Multiple Access with Collision Detection (CSMA/CD) | ||
CSNP | Complete Sequence Number PDU (CSNP) | ||
CSO | Cross-Stratum Optimization (CSO) | ||
CSP | Content Service Provider (CSP) | ||
Content Security Policy (CSP) | |||
Cloud Service Provider (CSP) | |||
CSPF | Constrained Shortest Path First (CSPF) | ||
cSPL | Composite Special-Purpose Label (cSPL) | ||
CSPRNG | cryptographically secure pseudorandom number generator (CSPRNG) | ||
CSR | Certificate Signing Request (CSR) | ||
Clock Synchronization Request (CSR) | |||
control and status registers (CSR) | |||
Customer Service Representative (CSR) | |||
CSRC | contributing source (CSRC) | ||
CSRF | cross-site request forgery (CSRF) | ||
CSS | Cascading Style Sheets (CSS) | ||
Connectivity Specifications Sequence (CSS) | |||
Controlled Slip Seconds (CSS) | |||
Conservative Slow Start (CSS) | |||
CT | Certificate Transparency (CT) | ||
Commissioning Tool (CT) | |||
Current Transformer (CT) | |||
CT_IU | Common Transport Information Unit (CT_IU) | ||
CTO | Congestion Timeout (CTO) | ||
CTM | Cellular Text Telephone Modem (CTM) | ||
CTR | Counter Mode (CTR) | ||
CTS | clear to send (CTS) | ||
Cipher Text Stealing (CTS) | |||
CUG | Closed User Group (CUG) | ||
CV | Connectivity Verification (CV) | ||
CVEs | Common Vulnerabilities and Exposures (CVEs) | ||
CVO | Coordination of Video Orientation (CVO) | ||
CW | Control Word (CW) | ||
Contention Window (CW) | |||
CWDM | Coarse Wavelength Division Multiplexing (CWDM) | ||
cwnd | congestion window (cwnd) | ||
CWR | Do not expand | TCP flag bit name | |
CWT | |||
d-CW | DetNet Control Word (d-CW) | ||
DA | Destination Address (DA) | ||
Datamover Architecture (DA) (for iSCSI) | |||
DAC | Dynamic Authorization Client (DAC) | ||
Duplicate Address Confirmation (DAC) | |||
Discretionary Access Control (DAC) | |||
digital-to-analog converter (DAC) | |||
Destination Address Compression (DAC) | |||
DAD | Duplicate Address Detection (DAD) | ||
DAG | Directed Acyclic Graph (DAG) | ||
DAM | Destination Address Mode (DAM) | ||
DAMA | Demand Assigned Multiple Access (DAMA) | ||
DANE | DNS-Based Authentication of Named Entities (DANE) | ||
DAO | Destination Advertisement Object (DAO) | ||
DAR | dynamic alternate routing (DAR) | ||
Duplicate Address Request (DAR) | |||
DARPA | Defense Advanced Research Projects Agency (DARPA) | ||
DART | Double Asteroid Redirection Test (DART) | ||
DASH | Dynamic Adaptive Streaming over HTTP (DASH) | ||
synonymous with MPEG-DASH | |||
DASS2 | Digital Access Signaling System 2 (DASS2) | ||
DBA | Dynamic Bandwidth Allocation (DBA) | ||
DC | data center (DC) | ||
delegated credential (DC) | |||
DCA | Domain Confidentiality Authority (DCA) | ||
DCB | Domain-wide Common Block (DCB) | ||
DCCP | Datagram Congestion Control Protocol (DCCP) | ||
dCDN | downstream Content Delivery Network (dCDN) | ||
DCE | Data Communications Equipment (DCE) | ||
Distributed Computing Environment (DCE) | |||
DCEP | Data Channel Establishment Protocol (DCEP) | ||
DCI | Data Center Interconnect (DCI) | ||
DCN | Data Center Network (DCN) | ||
DCO | Destination Cleanup Object (DCO) | ||
DCOM | Distributed Component Object Model (DCOM) | ||
DCT | Discrete Cosine Transform (DCT) | ||
DD | Database Description (DD) | ||
DDDS | Dynamic Delegation Discovery System (DDDS) | ||
DDNS | Dynamic DNS (DDNS) | ||
DDoS | * | Distributed Denial of Service (DDoS) | |
DDP | Device Discovery Protocol (DDP) | ||
Direct Data Placement Protocol (DDP) | |||
Direct Data Placement (DDP) | |||
DDR | Discovery of Designated Resolvers (DDR) | ||
DDT | Delegated Database Tree (DDT) | ||
DDUL | Dynamic DNS Update Lease (DDUL) | ||
DE | Discard Eligible (DE) | flag in a Frame Relay frame | |
Designated Expert (DE) | |||
DECADE | DECoupled Application Data Enroute (DECADE) | ||
DECT | Digital Enhanced Cordless Telecommunications (DECT) | ETSI EN 300175 | |
DEI | Drop Eligibility Indicator (DEI) | ||
DELT | Dual Ended Loop Test (DELT) | ||
DER | * | Distinguished Encoding Rules | |
DES | * | Data Encryption Standard (DES) | |
DetNet | Deterministic Networking (DetNet) | ||
DF | Don't Fragment (DF) | ||
Designated Forwarder (DF) | |||
DetNet Flow (DF) | |||
DFZ | Default-Free Zone (DFZ) | ||
DGIWG | Defence Geospatial Information Working Group (DGIWG) | ||
DH | Diffie-Hellman (DH) | ||
Distant Host (DH) | |||
DHAAD | Dynamic Home Agent Address Discovery (DHAAD) | ||
DHCP | * | Dynamic Host Configuration Protocol (DHCP) | |
DHCPv6 | * | Dynamic Host Configuration Protocol for IPv6 (DHCPv6) | |
DHCPv6-PD | DHCPv6 Prefix Delegation (DHCPv6-PD) | ||
DHT | Distributed Hash Table (DHT) | ||
DI | Datamover Interface (DI) | ||
DID | Direct Inward Dialing (DID) | ||
decentralized identifier (DID) | |||
DIFS | Distributed Interframe Space (DIFS) | ||
DIO | DODAG Information Object (DIO) | ||
DIS | DODAG Information Solicitation (DIS) | ||
Designated Intermediate System (DIS) | |||
DIT | Directory Information Tree (DIT) | ||
DKIM | DomainKeys Identified Mail (DKIM) | ||
DLC | Data Link Control (DLC) | ||
DLCI | Data Link Connection Identifier (DLCI) | ||
DLEP | Dynamic Link Exchange Protocol (DLEP) | ||
DLP | Discrete Logarithm Problem (DLP) | ||
Data Loss Prevention (DLP) | |||
DLSw | Data Link Switching (DLSw) | A forwarding mechanism for the IBM SNA (Systems Network Architecture). It places SNA NPDUs into a TCP connection between two routers, which tunnel them across an IP network. | |
DLV | DNSSEC Lookaside Validation (DLV) | ||
DM | Delay Measurement (DM) | ||
Disconnect Message (DM) | |||
DMARC | Domain-based Message Authentication, Reporting, and Conformance (DMARC) | ||
DMM | Delay Measurement Message (DMM) | ||
Distributed Mobility Management (DMM) | |||
DMR | Default Mapping Rule (DMR) | ||
DMS | Distribution Management System (DMS) | ||
Directed Multicast Service (DMS) | |||
DMTF | Distributed Management Task Force (DMTF) | ||
DN | Distinguished Name (DN) | ||
Data Network (DN) | |||
DNA | Detecting Network Attachment (DNA) | ||
Domain Name Association (DNA) | |||
DNR | Do Not Revert (DNR) | ||
Discovery of Network-designated Resolvers (DNR) | |||
DNS | * | Domain Name System | |
DNS-SD | DNS-based Service Discovery (DNS-SD) | ||
DNSBL | DNS BlockList | ||
DNS blacklist | |||
DNSSEC | * | DNS Security | |
* | DNS Security Extensions | ||
DNT | Do Not Track (DNT) | ||
DOCSIS | Data-Over-Cable Service Interface Specification (DOCSIS) | ||
DoD | Downstream-on-Demand (DoD) | ||
DODAG | Destination-Oriented Directed Acyclic Graph (DODAG) | ||
DoH | DNS (queries) over HTTPS (DoH) | ||
DOI | Domain of Interpretation (DOI) | ||
Digital Object Identifier (DOI) | |||
DOM | Document Object Model (DOM) | ||
DoQ | DNS over QUIC (DoQ) | ||
DoS | * | Denial of Service (DoS) | different from DOS (operating system) |
DoT | DNS over TLS (DoT) | ||
DOTS | DDoS Open Threat Signaling (DOTS) | ||
DP | Data Plane (DP) | ||
distribution point (DP) | |||
DNSSEC Policy (DS) | |||
DPA | Destination Preference Attribute | ||
DPI | deep packet inspection (DPI) | ||
DPLPMTUD | Datagram Packetization Layer PMTU Discovery (DPLPMTUD) | ||
DPNSS | Digital Private Network Signaling System (DPNSS) | ||
DPoP | Demonstrating Proof of Possession (DPoP) | ||
DPR | Disconnect-Peer-Request (DPR) | ||
DPS | Distributed Programming System (DPS) | ||
Domain Pseudonym System (DPS) | |||
DNSSEC Practice Statement (DPS) | |||
DR | designated router (DR) | ||
DRB | Designated RBridge (DRB) | ||
DRBG | deterministic random-bit generator (DRBG) | ||
DRC | duplicate request cache (DRC) | ||
DRCV | Data Receiver (DRCV) | ||
DRIP | Drone Remote Identification Protocol (DRIP) | ||
DRO | Discovery Reply Object (DRO) | ||
DRR | direct response routing (DRR) | ||
DRS | DGIWG Registry System (DRS) | ||
DRM | Digital Rights Management (DRM) | ||
DS | Diffserv (DS) | ||
Differentiated Services (DS) | |||
Delegation Signer (DS) | |||
DS-Lite | Dual-Stack Lite (DS-Lite) | ||
DSA | * | Digital Signature Algorithm (DSA) | |
DSAA2 | DECT Standard Authentication Algorithm #2 (DSAA2) | ||
DSACK | Duplicate Selective Acknowledgement (DSACK) | ||
DSAP | Destination Service Access Point (DSAP) | ||
DSC | DECT Standard Cipher (DSC) | ||
DNS Statistics Collector (DSC) | |||
DSC2 | DECT Standard Cipher #2 | ||
DSCP | Differentiated Services Code Point (DSCP) | ||
DSDL | Document Schema Definition Languages (DSDL) | ||
DSE | DSA-Specific Entry (DSE) | ||
DSL | * | Digital Subscriber Line (DSL) | |
DSLAM | Digital Subscriber Line Access Multiplexer (DSLAM) | ||
DSM | Demand-Side Management (DSM) | ||
DSN | Delivery Status Notification (DSN) | ||
Data Sequence Number (DSN) | |||
DSND | Data Sender (DSND) | ||
DSP | Digital Signal Processor (DSP) | ||
Digital Signal Processing (DSP) | |||
DSRC | Dedicated Short-Range Communication (DSRC) | ||
DSRCS | Dedicated Short-Range Communications Services (DSRCS) | ||
DSRK | Domain-Specific Root Key (DSRK) | ||
DSRL | Document Semantics Renaming Language | ||
DSS | Digital Signature Standard (DSS) | ||
Data Sequence Signal (DSS) | |||
DST | domain separation tag (DST) | ||
DSUSRK | Domain-Specific Usage-Specific Root Keys (DSUSRK) | ||
DT | Density Threshold (DT) | ||
DTCP | Digital Transmission Content Protection (DTCP) | ||
DTD | * | Document Type Definition | |
Deactivation Time Delay (DTD) | |||
DTE | Data Terminal Equipment (DTE) | ||
DTIM | Delivery Traffic Indication Map (DTIM) | ||
DTLS | * | Datagram Transport Layer Security (DTLS) | |
DTMF | dual-tone multi-frequency (DTMF) | ||
DTN | Delay-Tolerant Networking (DTN) | ||
DTNMA | Delay-Tolerant Networking Management Architecture (DTNMA) | ||
DTOS | Distributed Trusted Operating System (DTOS) | ||
DTS | decoding time stamp (DTS) | ||
decode time stamp (DTS) | |||
DTSN | Destination Advertisement Trigger Sequence Number (DTSN) | ||
DTX | Discontinuous Transmission (DTX) | ||
DUA | DASS 2 Extensions (DUA) | ||
DUID | DHCP Unique Identifier (DUID) | ||
DUNS | Data Universal Numbering System (DUNS) | ||
DUPACK | Duplicate Acknowledgment (DUPACK) | ||
DupThresh | Duplicate Acknowledgment Threshold (DupThresh) | ||
DUT | Device Under Test (DUT) | ||
DVB | Digital Video Broadcasting (DVB) | ||
DVB-H | Digital Video Broadcasting - Handheld (DVB-H) | ||
DVB-IPDC | Digital Video Broadcasting - Internet Protocol Datacast (DBC-IPDC) | ||
DVI | * | No expansion | |
DVMRP | Distance Vector Multicast Routing Protocol (DVMRP) | ||
DWDM | Dense Wavelength Division Multiplexing (DWDM) | ||
E.164 | * | No expansion | Refers to a telephone numbering plan as specified by the ITU-T E.164 specification |
E-L1CS | Extended Level 1 Circuit Scope (E-L1CS) | ||
E-L1FS | Extended Level 1 Flooding Scope (E-L1FS) | ||
E-LAN | Bidirectional Logical Connectivity between >2 UNIs (E-LAN) | ||
Ethernet LAN | provides multipoint connectivity | ||
E-LINE | Ethernet point-to-point connectivity | ||
E-LMI | Ethernet Local Management Interface (E-LMI) | ||
E-LSP | Explicitly TC-encoded-PSC LSP (E-LSP) | expansion in RFC 3270 was updated by RFC 5462 | |
E-UTRAN | Evolved Universal Terrestrial Radio Access Network (E-UTRAN) | ||
E-VLAN | Ethernet Virtual Private LAN (E-VLAN) | ||
E2E | end to end (E2E) | ||
EA | Embedded Address (EA) | ||
EAG | Extended Administrative Group (EAG) | ||
EAI | Email Address Internationalization (EAI) | ||
EAP | Extensible Authentication Protocol (EAP) | ||
EAP-AKA | EAP Authentication and Key Agreement (EAP-AKA) | ||
EAP-GSPK | Extensible Authentication Protocol - Generalized Pre-Shared Key (EAP-GPSK) | ||
EAP-SIM | EAP Subscriber Identity Module (EAP-SIM) | ||
EAP-TTLS | Extensible Authentication Protocol Tunneled Transport Layer Security (EAP-TTLS) | ||
EARO | Extended Address Registration Option (EARO) | ||
EATF | Emergency Access Transfer Function (EATF) | ||
EBCDIC | * | Extended Binary Coded Decimal Interchange Code (EBCDIC) | |
EBGP | External BGP (EBGP) | ||
EBM | Equipped Bit Mask (EBM) | ||
EC | Elliptic Curve (EC) | ||
Extended Communities (EC) | |||
Exchange Complete (EC) | |||
EC2N | Elliptic Curve Group over GF[2^N] | as in EC2N group | |
ECA | Event-Condition-Action (ECA) | ||
ECAM | European Committee for Academic Middleware (ECAM) | ||
ECB | electronic codebook (ECB) | ||
ECC | Elliptic Curve Cryptography (ECC) | ||
ECC CDH | Elliptic Curve Cryptography Cofactor Diffie-Hellman (ECC CDH) | ||
ECCSI | Elliptic Curve-Based Certificateless Signatures for Identity-Based Encryption (ECCSI) | ||
ECDH | Elliptic Curve Diffie-Hellman | ||
ECDHE | Ephemeral Elliptic Curve Diffie-Hellman (ECDHE) | ||
ECDSA | Elliptic Curve Digital Signature Algorithm (ECDSA) | ||
ECE | Explicit Congestion Notification-Echo / ECN-Echo (ECE) | ||
ECM | Error Correction Mode (ECM) | ||
Encapsulated Control Message (ECM) | |||
ECMP | * | Equal-Cost Multipath (ECMP) | |
ECMQV | Elliptic Curve Menezes-Qu-Vanstone (ECMQV) | ||
ECN | Explicit Congestion Notification (ECN) | ||
ECP | Elliptic Curve Group over GF[P] | as in ECP group | |
Electronic CodeBook (ECP) | |||
Encryption Control Protocol (ECP) | |||
eCPRI | enhanced CPRI (eCPRI) | ||
ECRTP | Enhanced Compressed RTP (ECRTP) | ||
ECS | EDNS Client Subnet (ECS) | ||
ECT | ECN-Capable Transport (ECT) | ||
Encapsulating Content Type (ECT) | |||
ECVRF | Elliptic Curve Verifiable Random Function (ECVRF) | ||
EDAC | Extended Duplicate Address Confirmation (EDAC) | ||
EDAR | Extended Duplicate Address Request (EDAR) | ||
EDCA | Enhanced Distributed Channel Access (EDCA) | ||
EDD | Externally Defined Data (EDD) | ||
EdDSA | Edwards-curve Digital Signature Algorithm (EdDSA) | ||
EDF | empirical distribution function (EDF) | ||
EDGE | Enhanced Data rates for GSM Evolution (EDGE) | ||
EDI | Electronic Data Interchange (EDI) | ||
EDIINT | Electronic Data Interchange - Internet Integration (EDIINT) | WG name | |
EDN | Extended Diagnostic Notation (EDN) | ||
EDNS(0) | Extension Mechanisms for DNS (EDNS(0)) | ||
EDNS0 | Extension Mechanisms for DNS (EDNS0) | ||
EE | End Entity (EE) | ||
EENA | European Emergency Number Association (EENA) | ||
EF | Expedited Forwarding | as in “Diffserv EF” | |
EFCI | Explicit Forward Congestion Indication (EFCI) | ||
EFM | Ethernet First Mile (EFM) | ||
EFR | Enhanced Full Rate (EFR) | ||
EGP | * | Exterior Gateway Protocol | |
EH | Extension Header (EH) | ||
EHLO | * | Extended Hello | For the template in RFC 5321, “EHLO” is specified a term of art, not an abbreviation. |
EHV | Extra-High Voltage (EHV) | ||
EID | Endpoint Identifier (EID) | ||
Extension Header ID (EID) | |||
EIGRP | Enhanced Interior Gateway Routing Protocol (EIGRP) | Cisco's | |
EIP | Extended Internet Protocol (EIP) | ||
EISS | Extended Internal Sublayer Service (EISS) | ||
EIR | Equipment Identity Register (EIR) | ||
EIRP | Equivalent Isotropic Radiated Power (EIRP) | ||
Effective Isotropically Radiated Power (EIRP) | |||
EKM | Exported Keying Material (EKM) | ||
EKT | Encrypted Key Transport (EKT) | ||
EKU | extended key usage (EKU) | ||
EL | Entropy Label (EL) | ||
ELF | Executable and Linkable Format (ELF) | ||
ELI | Entropy Label Indicator (ELI) | ||
ELOC | Endpoint Locator (ELOC) | ||
EMA | External Measurement Agent (EMA) | ||
eMBB | enhanced Mobile Broadband (eMBB) | ||
eMMC | embedded Multimedia Chip (eMMC) | ||
EMS | Energy Management Systems (EMS) | as in Smart Grid | |
Element Management System (EMS | |||
EMSK | Extended Master Session Key (EMSK) | ||
eNB | Evolved Node B (eNB) | ||
ENT | Empty Non-Terminal (ENT) | ||
ENUM | * | No expansion | Refers generally to a telephone numbering plan. However, the term ENUM is universal, whereas Telephone Number Mapping is not. There are ENUM activities and organizations all over the world. The “long name” of the ENUM WG is the anomaly, because ENUM is not an abbreviation, despite appearances. |
EOF | * | End of File (EOF) | |
EOF | Extended Options and Flags (EOF) | ||
EoR | End-of-Row (EoR) | ||
EOR | * | exclusive or | In logical operations, the exclusive disjunction, also called exclusive or, (symbolized XOR or EOR), is a type of logical disjunction on two operands that results in a value of “true” if and only if exactly one of the operands has a value of “true.” (Wikipedia) |
End of Rib (EoR) | |||
EPA | Explicit Path Attribute (EPA) | ||
EPC | Electronic Product Code (EPC) | ||
Evolved Packet Core (EPC) | |||
EPD | Endpoint Discriminator (EPD) | ||
EtherType Protocol Discrimination (EPD) | |||
EPI | Educational Policy Institute (EPI) | ||
EPL | Ethernet Private Line (EPL) | ||
EPON | Ethernet Passive Optical Network (EPON) | ||
EPP | Extensible Provisioning Protocol (EPP) | ||
EPS | Evolved Packet System (EPS) | ||
EPUB | * | electronic publication (EPUB) | |
ER | EAP Re-authentication (ER) | ||
Explicit Route (ER) | |||
ERE | Extended Regular Expressions (ERE) | ||
ERLD | Entropy Readable Label Depth (ERLD) | ||
ERO | Explicit Route Object (ERO) | ||
ERP | EAP Re-authentication Protocol (ERP) | ||
Enterprise Resource Provision (ERP) | |||
Enterprise Resource Planning (ERP) | |||
ERT | Expected Residual Time (ERT) | ||
ERU | Effective Request URI (ERU) | ||
ERX | EAP Re-authentication Extension (ERX) | ||
ES | Errored Seconds (ES) | ||
Ethernet Segment (ES) | |||
ES-IS | End System to Intermediate System | ||
ESA | Effective Security Association (ESA) | ||
ESADI | End-Station Address Distribution Information (ESADI) | ||
ESB | Extension Security Block (ESB) | ||
ESC | Event State Compositor (ESC) | ||
ESI | Error Source Identifier (ESI) | ||
Entity Status Inquiry | |||
Encoding Symbol ID | |||
Energy Services Interface (ESI) (Smart Grid) | |||
Ethernet Segment Identifier (ESI) | |||
ESMC | Ethernet Synchronization Messaging Channel (ESMC) | ||
ESMTP | * | Extended Simple Mail Transfer Protocol | |
ESN | Electronic Serial Number (ESN) | ||
Extended Sequence Number | Per EID 3615, the N (of ESN) can also be “Numbers”, but the abbreviation should not be plural (i.e., the abbreviation should still be ESN. | ||
ESO | Extended Security Option (ESO) | ||
ESP | Encapsulating Security Payload (ESP) | ||
eSPL | Extended Special-Purpose Label (eSPL) | ||
ESRP | Emergency Service Routing Proxy (ESRP) | ||
ESS | Extended Service Set (ESS) | ||
Enhanced Security Services (ESS) | |||
EST | Enrollment over Secure Transport (EST) | ||
ETag | entity-tag (ETag) | ||
ETLD | Effective Transport Label-Stack Depth (ETLD) | ||
ETM | excess-traffic-marked (ETM) | ||
ETR | Egress Tunnel Router (ETR) | ||
ETS | Emergency Telecommunications Service (ETS) | ||
ETSI | * | European Telecommunications Standards Institute (ETSI) | |
ETX | Expected Transmission Count (ETX) | ||
EUI | Extended Unique Identifier (EUI) | ||
EUI-64 | 64-bit Extended Unique Identifier (EUI-64) | ||
EVB | Edge Virtual Bridging (EVB) | ||
Edge Virtual Bridge (EVB) | |||
EVDO | Evolution-Data Optimized (EVDO) | ||
EVI | EVPN Instance (EVI) | ||
EVPL | Ethernet Virtual Private Line (EVPL) | ||
EVPN | * | Ethernet VPN (EVPN) | |
EVRC | Enhanced Variable Rate CODEC (EVRC) | ||
EVRC-NW | Enhanced Variable Rate Narrowband-Wideband Codec (EVRC-NW) | ||
EVS | Extended-Vendor-Specific (EVS) | ||
eVTOL | electric vertical take-off and landing (eVTOL) | ||
EWMA | exponentially weighted moving average (EWMA) | ||
EXI | Efficient XML Interchange (EXI) | ||
F-BM | Forwarding Bit Mask (F-BM) | ||
FA | forwarding adjacency (FA) | ||
Foreign Agent (FA) | |||
FAD | feature and attribute data (FAD) | ||
FAN ELS | Fabric Address Notification Extended Link Service (FAN ELS) | Pronounced “fan ee el es”. | |
FARP | Fibre Channel Address Resolution Protocol (FARP) | Pronounced “farp”. | |
FAT | flow-aware transport (FAT) | ||
FBL | Feedback Loop (FBL) | ||
FCAG | Frequency Control Automatic Generation (FCAG) | ||
FCAPS | Fault, Configuration, Accounting, Performance, and Security (FCAPS) | ||
FCC | Floor Control Chair (FCC) | ||
File Carbon Copy (FCC) | |||
FCFS | First come, first served (FCFS) | ||
FCI | Feedback Control Information (FCI) | ||
Footprint & Capabilities Advertisement interface (FCI) | |||
FCIP | Fibre Channel Over TCP/IP (FCIP) | ||
FCP | Fibre Channel Protocol (FCP) | ||
Floor Control Participant (FCP) | |||
FCS | Frame Check Sequence (FCS) | ||
Floor Control Server | |||
FDB | Filtering Database (FDB) | ||
FDH | Full Domain Hashing (FDH) | ||
FDDI | Fiber Distributed Data Interface (FDDI) | ||
FDMA | Frequency-Division Multiplex (FDMA) | ||
FDT | File Delivery Table (FDT) | ||
FE | Forwarding Element (FE) | ||
FEC | Forward Error Correction (FEC) | ||
Forwarding Equivalence Class (FEC) | as in MPLS | ||
Forward Erasure Correction (FEC) | |||
FECN | Forward Explicit Congestion Notification (FECN) | ||
FedFS | Federated File System (FedFS) | ||
FEM | Forwarding Element Manager (FEM) | ||
FF | Fixed-Filter (FF) | ||
FFC | Finite Field Cryptography (FFC) | ||
FFCI | FEC Framework Configuration Information (FFCI) | ||
FFD | Full Function Device (FFD) | ||
ffs | for further study | ||
FFT | Fast Fourier Transform (FFT) | ||
FG | forest guide (FG) | ||
FGL | Fine-Grained Labeling (FGL) | ||
Fine-Grained Labeled (FGL) | |||
Fine-Grained Label (FGL) | |||
FHR | First-Hop Router (FHR) | ||
FI | Forwarding Indicator (FI) | ||
FIA | form interpretation algorithm (FIA) | W3C VoiceXML 2.0 | |
FIB | * | Forwarding Information Base (FIB) | |
FID | Flow ID (FID) | ||
FIFO | * | First In, First Out | |
FII | Forked Instance Identifier (FII) | ||
FILS | Fast Initial Link Setup (FILS) | ||
FIN | Not expanded | TCP flag bit name; see SYN. | |
FIPS | * | Federal Information Processing Standards (FIPS) | |
FIR | Full Intra Request (FIR) | ||
FLAC | Free Lossless Audio Codec (FLAC) | ||
FLASK | Flux Advanced Security Kernel (FLASK) | ||
FLISR | Fault Location, Isolation, and Service Restoration (FLISR) | ||
FLR | Frame Loss Ratio (FLR) | ||
FLUTE | File Delivery over Unidirectional Transport (FLUTE) | ||
FM | forwarding management (FM) | ||
Fault Management (FM) | |||
FMIPv6 | Fast Handovers for Mobile IPv6 (FMIPv6) | ||
FMR | Forwarding Mapping Rule (FMR) | ||
First Matching Rule (FMR) | |||
FMT | feedback message type (FMT) | ||
FNV | Fowler/Noll/Vo (FNV) | ||
ForCES | Forwarding and Control Element Separation (ForCES) | ||
FP | Fixed Part (FP) | ||
FPGA | Field-Programmable Gate Array (FPGA) | ||
FPS | Frames Per Second (FPS) | ||
FQ | Fair Queuing (FQ) | ||
FQDN | Fully Qualified Domain Name (FQDN) | ||
FR | Frame Relay (FR) | ||
FRAND | fair, reasonable, and non-discriminatory (FRAND) | ||
FRER | Frame Replication and Elimination for Redundancy (FRER) | ||
FRR | Fast Reroute (FRR) | ||
F-RTO | Forward RTO-Recovery (F-RTO) | ||
FS-LSP | Flooding Scope LSP (FS-LSP) | ||
FSID | File System ID (FSID) | ||
FSM | Finite State Machine (FSM) | ||
FSPF | Fabric Shortest Path First (FSPF) | ||
FSSI | FEC-Scheme-Specific Information (FSSI) | ||
FT | feedback target (FT) | ||
FTN | FEC-to-NHLFE (FTN) | ||
FTP | * | File Transfer Protocol | |
FTTH | fiber to the home (FTTH) | ||
FWS | folding white space (FWS) | ||
G-ACh | Generic Associated Channel (G-ACh) | ||
GAL | Generic Associated Channel Label (GAL) | ||
G-ACh Label (GAL) | |||
GAP | Generic Access Profile (GAP) | ||
GARP | Generic Attribute Registration Protocol (GARP) | ||
Gratuitous ARP (GARP) | |||
GAS | Generic Advertisement Service (GAS) | ||
GATT | Generic Attribute Profile (GATT) | ||
GbE | Gigabit Ethernet (GbE) | ||
GBR | Guaranteed Bit Rate (GBR) | ||
GBS | Generic Bonding Sub-layer (GBS) | ||
GCKS | Group Controller/Key Server (GCKS) | ||
GCM | Galois/Counter Mode (GCM) | ||
GCO | Global Concurrent Optimization (GCO) | ||
GCR | GroupCast with Retries (GCR) | ||
GDOI | Group Domain of Interpretation (GDOI) | ||
Geneve | Generic Network Virtualization Encapsulation (Geneve) | ||
GERAN | GSM/EDGE Radio Access Network (GERAN) | ||
GFP | Generic Framing Procedure (GFP) | ||
GGSN | Gateway GPRS Support Node (GGSN) | ||
GHC | Generic Header Compression (GHC) | ||
GID | Group Identifier (GID) | ||
Global Identifier (GID) | |||
GIST | General Internet Signaling Transport (GIST) | ||
GLB | Global Locator Block (GLO) | ||
GLONASS | Global Orbiting Navigation Satellite System (GLONASS) | ||
GLOP | * | No expansion | |
GMA | Generalized Modulus Algorithm (GMA) | ||
GMAC | Galois Message Authentication Code (GMAC) | ||
GMII | Gigabit Media Independent Interface (GMII) | ||
GML | Geography Markup Language (GML) | ||
GMPLS | * | Generalized Multiprotocol Label Switching (GMPLS) | |
GMRP | GARP Multicast Registration Protocol (GMRP) | ||
GNAP | Grant Negotiation and Authorization Protocol (GNAP) | ||
gNMI | gRPC Network Management Interface (gNMI) | ||
GNS | GNU Name System (GNS) | ||
GNSS | Global Navigation Satellite System | ||
GOOSE | Generic Object Oriented Substation Events (GOOSE) | ||
GPL | General Public License (GPL) | ||
GPMD | General-Purpose Media Descriptor (GPMD) | ||
GPRS | General Packet Radio Service (GPRS) | ||
General Packet Radio System (GPRS) | |||
GPS | * | Global Positioning System (GPS) | |
GPU | Graphics Processing Unit (GPU) | ||
GRASP | Generic Autonomic Signaling Protocol (GRASP) | ||
GRE | * | Generic Routing Encapsulation (GRE) | |
GRUU | Globally Routable User Agent URI (GRUU) | ||
GSAKMP | Group Secure Association Key Management Protocol (GSAKMP) | ||
GSE | Generalized Structure Element (GSE) | ||
GSI | Grid Security Infrastructure (GSI) | ||
GSLB | Global Server Load Balancing (GSLB) | ||
GSM | * | Global System for Mobile Communications (GSM) | |
GSMA | Global System for Mobile Communications Association (GSMA) | ||
GSPD | Group Security Policy Database (GSPD) | ||
GSPM | Generic Secure Password Method (GSPM) | ||
GSS-API | Generic Security Service Application Program Interface (GSS-API) | ||
GSTN | General Switched Telephone Network (GSTN) | ||
Global Switched Telephone Network (GSTN) | |||
GTK | Group Temporal Key (GTK) | ||
gTLD | Generic Top-Level Domain (gTLD) | ||
GTP | Generic Tunneling Protocol (GTP) | ||
GPRS Tunnelling Protocol (GTP) | |||
GTSM | Generalized TTL Security Mechanism (GTSM) | ||
GUA | Global Unicast Address (GUA) | ||
GUI | * | Graphical User Interface (GUI) | |
GUID | Globally Unique Identifier (GUID) | ||
GVRP | Generic VLAN Registration Protocol (GVRP) | ||
H-PCE | Hierarchical PCE (H-PCE) | ||
H-VPLS | Hierarchical Virtual Private LAN Service (H-VPLS) | ||
HA | Home Agent (HA) | ||
HAAA | Home AAA (HAAA) | ||
HAC | Home Agent Controller (HAC) | ||
HAS | HTTP Adaptive Streaming (HAS) | ||
HBA | Host Bus Adapter (HBA) | ||
Host-Based Authentication (HBA) | |||
Hash-Based Addresses (HBA) | |||
HbH | Hop-by-Hop (HbH) | ||
HC | high capacity (HC) | ||
Header Compression (HC) | |||
HCA | Host Channel Adapter (HCA) | ||
HCI | Host-Controller Interface (HCI) | ||
HD | * | High Definition (HD) | |
HDCP | High-bandwidth Digital Content Protection (HDCP) | ||
HDLC | High-Level Data Link Control (HDLC) | ||
HELD | HTTP-Enabled Location Delivery (HELD) | ||
HET | Header Extension Type (HET) | ||
HFC | Hybrid Fiber Coaxial (HFC) | ||
HFS+ | Hierarchical File System Plus (HFS+) | ||
HG | home gateway (HG) | ||
HHIT | Hierarchical Host Identity Tags (HHIT) | ||
HI | Host Identifier (HI) | ||
Host Identity (HI) | |||
HIP | Host Identity Protocol (HIP) | ||
hIPv4 | hierarchical IPv4 (hIPv4) | ||
HIT | Host Identity Tag (HIT) | ||
HKDF | HMAC-based Key Derivation Function (HKDF) | ||
HL | Hop Limit (HL) | ||
HLR | Home Location Register (HLR) | ||
HMAC | Hashed Message Authentication Code (HMAC) | ||
Hash-Based Message Authentication Code (HMAC) | |||
HMI | Human-Machine Interface (HMI) | ||
HMIPv6 | Hierarchical Mobile IPv6 (HMIPv6) | ||
HNCP | Home Networking Control Protocol (HNCP) | ||
HoA | Home Address (HoA) | ||
HOBA | HTTP Origin-Bound Authentication (HOBA) | ||
HoT | Home Test (HoT) | ||
HoTI | Home Test Init (HoTI) | ||
HOKEY | Handover Keying (HOKEY) | ||
HPC | High-Performance Computing (HPC) | ||
HPKE | hybrid public key encryption (HPKE) | ||
HPKP | HTTP Public Key Pinning (HPKP) | ||
HPTP | HTTP-based Peer to Peer (HPTP) | ||
HTTP-based Peer-to-Peer (HPTP) | |||
hSFC | Hierarchical Service Function Chaining (hSFC) | ||
HSM | Hardware Security Module (HSM) | ||
HSMP | Hub and Spoke Multipoint (HSMP) | ||
HSPA | High Speed Packet Access (HSPA) | No hyphen; it's not our term to define. | |
HSR | High-availability Seamless Redundancy (HSR) | ||
HSS | Home Subscriber Server (HSS) | ||
HSTCP | HighSpeed TCP (HSTCP) | ||
HSTS | HTTP Strict Transport Security (HSTS) | ||
HTTP | * | HyperText Transfer Protocol (HTTP) | |
HTTPS | * | Hypertext Transfer Protocol Secure (HTTPS) | |
HTML | * | HypterText Markup Language (HTML) | |
HV | High Voltage (HV) | ||
I-CPI | Intermediate-Controller Plane Interface (I-CPI) | ||
I-D | Internet-Draft (I-D) | ||
I-JSON | Internet JSON (I-JSON) | ||
I-PMSI | Inclusive PMSI (I-PMSI) | ||
I-SID | Service Instance Identifier (I-SID) (IEEE) | ||
I2NSF | Interface to Network Security Functions (I2NSF) | ||
I2RS | Interface to the Routing System (I2RS) | ||
IaaS | Infrastructure as a Service (IaaS) | ||
IA | Identity Association (IA) | ||
IA-RWA | Impairment-Aware Routing and Wavelength Assignment (IA-RWA) | ||
IA_PD | Identity Association for Prefix Delegation (IA_PD) | ||
IAB | * | Internet Architecture Board (IAB) | Should only be expanded for introductory docs, e.g., Tao of the IETF, RFC 3160 |
IACD | Interface Adjustment Capability Descriptor (IACD) | ||
IACS | Industrial Automation and Control System (IACS) | ||
IAID | Identity Association IDentifier (IAID) | ||
IAMM | In-line Aware MRB Mode (IAMM) | ||
IANA | * | Internet Assigned Numbers Authority (IANA) | Should only be expanded for introductory docs, e.g., Tao of the IETF, RFC 3160 |
IAOC | IETF Administrative Oversight Committee (IAOC) | ||
IAP | Intercept Access Point (IAP) | ||
Internet Access Provider (IAP) | |||
Intermediate Anonymization Process (IAP) | |||
IASA | IETF Administrative Support Activity (IASA) | ||
IAX | Inter-Asterisk eXchange (IAX) | ||
IBAKE | Identity-Based Authenticated Key Exchange (IBAKE) | ||
IBCF | Interconnection Border Control Function (IBCF) | ||
IBE | Identity-Based Encryption (IBE) | ||
IBGP | Internal BGP (IBGP) | ||
ICANN | * | Internet Corporation for Assigned Names and Numbers (ICANN) | |
ICC | ITU Carrier Code (ICC) | as listed on ITU Carrier Codes | |
ICCP | Inter-Chassis Communication Protocol (ICCP) | ||
ICE | Interactive Connectivity Establishment (ICE) | ||
ICE PAC | Interactive Connectivity Establishment Patiently Awaiting Connectivity (ICE PAC) | ||
ICMP | * | Internet Control Message Protocol (ICMP) | |
ICN | Initial Counter Nonce (ICN) | ||
Information-Centric Networking (ICN) | |||
ICP | Internet Content Provider (ICP) | ||
ICRP | Incoming-Call-Reply (ICRP) | ||
ICRQ | Incoming-Call-Request (ICRQ) | ||
ICS | IMS Centralized Services (ICS) | ||
ICSA | International Computer Security Association (ICSA) | ||
ICT | Inner Content Type (ICT) | ||
Information and Communications Technology (ICT) | |||
ICV | Integrity Check Value (ICV) | ||
IDEA | International Data Encryption Algorithm (IDEA) | ||
IDevID | Initial Device Identifier (IDevID) | ||
IDN | Internationalized Domain Name (IDN) | ||
IDNA | Internationalizing Domain Names in Applications (IDNA) | ||
Internationalized Domain Names for Applications (IDNA) | |||
IdP | Identity Provider (IdP) | ||
IDR | Instantaneous Decoding Refresh (IDR) | ||
IDRP | Inter-Domain Routing Protocol (IDRP) | ISO/IEC 10747 | |
IDS | Intrusion Detection System (IDS) | ||
IDSN | Initial Data Sequence Number (IDSN) | ||
IE | Information Element (IE) | ||
Internet Explorer (IE) | |||
IEA | Ingress Egress Aggregate (IEA) | ||
IEC | * | International Electrotechnical Commission (IEC) | |
IED | Intelligent Electronic Device (IED) | ||
IEEE | * | Institute of Electrical & Electronics Engineers (IEEE) | |
IESG | * | Internet Engineering Steering Group (IESG) | Should only be expanded for introductory docs, e.g., Tao of the IETF, RFC 3160 |
IETF | * | Internet Engineering Task Force (IETF) | Should only be expanded for introductory docs, e.g., Tao of the IETF, RFC 3160 |
IETF LLC | IETF Administration Limited Liability Company (IETF LLC) | ||
IF | intermediate frequency (IF) | ||
iff | * | if and only if | From mathematical logic |
IFG | Inter-Frame Gap (IFG) | ||
IGD | Internet Gateway Device (IGD) | ||
IGMP | * | Internet Group Management Protocol (IGMP) | |
IGP | * | Interior Gateway Protocol (IGP) | |
IGRP | Interior Gateway Routing Protocol | precursor of EIGRP | |
IHL | Internet Header Length (IHL) | ||
IID | Instance ID (IID) | ||
Interface Identifier (IID) | |||
i.i.d. | independent and identically distributed (i.i.d.) | ||
IIF | Incoming Interface (IIF) | ||
IIH | IS-IS Hello (IIH) | ||
IIR | infinite impulse response (IIR) | ||
IKE | Internet Key Exchange Protocol (IKE) | ||
Internet Key Exchange (IKE) | |||
IKEv2 | Internet Key Exchange Protocol Version 2 (IKEv2) | ||
IKM | input keying material (IKM) | ||
ILM | Incoming Label Map (ILM) | ||
ILMI | Integrated Local Management Interface (ILMI) | ||
ILNP | Identifier-Locator Network Protocol (ILNP) | ||
Interim LNP (ILNP) | |||
ILV | Index-Length-Value (ILV) | ||
IMA | Inverse Multiplexing for ATM (IMA) | ||
IMAP | * | Internet Message Access Protocol (IMAP) | |
IMDN | Instant Message Disposition Notification (IMDN) | ||
IMEI | International Mobile Equipment Identity (IMEI) | ||
International Mobile station Equipment Identity (IMEI) | per 3GPP | ||
IMEISV | International Mobile station Equipment Identity and Software Version number (IMEISV) | ||
IMET | Inclusive Multicast Ethernet Tag (IMET) | ||
IMG | Inter-domain Multicast Gateway (IMG) | ||
iMIP | iCalendar Message-Based Interoperability Protocol (iMIP) | ||
IMPP | Instant Messaging and Presence Protocol (IMPP) | ||
IMS | IP Multimedia Subsystems (IMS) | ||
IMSI | International Mobile Subscriber Identity (IMSI) | ||
INCITS | INternational Committee for Information Technology Standards (INCITS) | ||
INR | Internet Number Resource (INR) | ||
INT | In-Band Network Telemetry (INT) | ||
I/O | * | Input/Output (I/O) | |
IO | information object (IO) | ||
Initialize Only (IO) | |||
IOAM | In situ Operations, Administration, and Maintenance (IOAM) | RFC 9197 | |
IODEF | Incident Object Description Exchange Format (IODEF) | ||
IOI | Item of Interest (IOI) | ||
Inter Operator Identifier (IOI) | |||
ION | IETF Operational Notes (ION) | ||
IOS | * | Internetwork Operating System (IOS) | as in Cisco IOS |
IoT | Internet of Things (IoT) | ||
IoTSU | Internet of Things Software Update (IoTSU) | ||
IP | * | Internet Protocol (IP) | |
IP-OBU | IP On-Board Unit (IP-OBU) | ||
IP-RSU | IP Road-Side Unit (IP-RSU) | ||
IP-VRF | IP Virtual Routing and Forwarding (IP-VRF) | ||
IPBX | IP Private Branch Exchange (IPBX) | ||
IPEI | International Portable Equipment Identity (IPEI) | ||
IPCP | IP Control Protocol (IPCP) | ||
IPDV | Inter-Packet Delay Variation (IPDV) | ||
IP Packet Delay Variation (IPDV) | |||
IPFIX | IP Flow Information Export (IPFIX) | ||
IPFRR | IP Fast Reroute (IPFRR) | ||
IPHC | IP Header Compression (IPHC) | ||
IPLS | IP-only LAN Service (IPLS) | ||
IPMI | Intelligent Platform Management Interface (IPMI) | ||
IPng | * | IP Next Generation (IPng) | |
IPoE | IP over Ethernet (IPoE) | ||
IPoIB | IP over InfiniBand (IPoIB) | ||
IPP | Internet Printing Protocol (IPP) | ||
IPPM | IP Performance Metrics (IPPM) | ||
IPR | * | Intellectual Property Rights (IPR) | |
IPRAN | IP Radio Access Network (IPRAN) | ||
IPS | Intrusion Prevention System (IPS) | ||
IPsec | * | IP Security (IPsec) | |
IPSO | IP Security Option (IPSO) | ||
Internet Protocol for Smart Objects (IPSO) | |||
IPSP | Internet Protocol Support Profile (IPSP) | ||
IPSS | Internet Protocol Support Service (IPSS) | ||
IPTV | * | No expansion | A service that delivers television signals over an RTP/UDP/IP video stream. It is read “IP TV”. |
IPv4 | * | Internet Protocol version 4 (IPv4) | |
IPv4aaS | IPv4-as-a-Service (IPv4aaS) | ||
IPv6 | * | Internet Protocol version 6 (IPv6) | |
IPX | Internetwork Packet Exchange (IPX) | ||
IP Packet eXchange (IPX) | |||
IPWAVE | IP Wireless Access in Vehicular Environments (IPWAVE) | ||
IQN | iSCSI Qualified Name (IQN) | ||
IR | Initiation and Refresh (IR) | ||
Internet Registry (IR) | |||
Ingress Replication (IR) | |||
IRB | Integrated Routing and Bridging (IRB) | RFC 8317 | |
IRC | Internet Relay Chat (IRC) | ||
IRD | Information Resource Directory (IRD) | ||
IRI | Internationalized Resource Identifier (IRI) | ||
IRIG | Inter-Range Instrumentation Group (IRIG) | ||
IRO | Include Route Object (IRO) | ||
IRON | Internet Routing Overlay Network (IRON) | ||
IRR | Internet Routing Registry (IRR) | ||
IRTF | * | Internet Research Task Force (IRTF) | Should only be expanded for introductory docs, e.g., Tao of the IETF, RFC 3160 |
IS | Information Service (IS) | ||
* | Intermediate System (IS) | ||
IS-IS | * | Intermediate System to Intermediate System (IS-IS) | routing protocol |
ISAKMP | Internet Security Association and Key Management Protocol (ISAKMP) | ||
ISATAP | Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) | ||
ISC | Internet Systems Consortium (ISC) | ||
ISCD | Interface Switching Capability Descriptor | ||
iSCSI | Internet Small Computer System Interface (iSCSI) | ||
ISE | Independent Submissions Editor (ISE) | ||
ISDN | * | Integrated Services Digital Network (ISDN) | |
iSER | iSCSI Extensions for RDMA (iSER) | ||
ISI | Information Sciences Institute (ISI) | ||
ISID | Initiator Session Identifier (ISID) | ||
iSNS | Internet Storage Name Service (iSNS) | ||
ISO | * | International Organization for Standardization (ISO) | |
ISOC | * | Internet Society (ISOC) | |
ISP | * | Internet Service Provider (ISP) | |
iSPF | incremental Shortest Path First (iSPF) | ||
ISS | Internal Sublayer Service (ISS) | ||
ISSN | * | International Standard Serial Number (ISSN) | |
ISSU | In-Service Software Upgrade (ISSU) | ||
IST | Internal Spanning Tree (IST) | ||
ISUP | ISDN User Part (ISUP) | ||
iTIP | iCalendar Transport-independent Interoperability Protocol (iTIP) | ||
ITN | individual taxpayer number (ITN) | ||
ITR | Ingress Tunnel Router (ITR) | ||
ITS | Intelligent Transport Systems (ITS) | ||
ITT | Initiator Task Tag (ITT) | ||
ITU | * | International Telecommunication Union | Note the singular “Telecommunication” per "About ITU" -- not the plural “Telecommunications” that authors often use |
ITU-T | * | ITU Telecommunication standardization sector | |
IU | Information Unit (IU) | ||
IUA | ISDN Q.921-User Adaptations Layer (IUA) | ||
IUF | Initialize-Update-Finalize (IUF) | ||
IUMM | In-line Unaware MRB Mode (IUMM) | ||
IV | Initialization Vector (IV) | ||
Impairment Validation (IV) | |||
IVL | Independent VLAN Learning (IVL) | ||
IVR | Interactive Voice Response (IVR) | ||
IW | Initial Window (IW) | ||
IWF | Interworking Function (IWF) | ||
IWLAN | Interworking Wireless LAN (IWLAN) | ||
IXFR | Incremental Zone Transfer (IXFR) | ||
IXoT | IXFR over TLS (IXoT) | ||
IXP | Internet Exchange Point (IXP) | ||
JA | Joining Assistant (JA) | ||
JAR | JWT Secured Authorization Request (JAR) | ||
JCR | JSON Content Rules (JCR) | ||
JID | Jabber Identifier (JID) | Per guidance, “Jabber ID” preferred. | |
JMAP | JSON Meta Application Protocol (JMAP) | ||
JOSE | JSON Object Signing and Encryption (JOSE) | ||
J-PAKE | Juggling PAKE (J-PAKE) | ||
JPEG | * | Joint Photographic Experts Group (JPEG) | |
JRD | JSON Resource Descriptor (JRD) | ||
JSEP | JavaScript Session Establishment Protocol (JSEP) | ||
JSON | * | JavaScript Object Notation (JSON) | |
JWA | JSON Web Algorithms (JWA) | ||
JWE | JSON Web Encryption (JWE) | ||
JWK | JSON Web Key (JWK) | ||
JWS | JSON Web Signature (JWS) | ||
JWT | Joint Working Team (JWT) | ||
JSON Web Token (JWT) | |||
JavaScript Object Notation Web Token (JWT) | |||
KAM3 | Key Agreement Mechanism 3 (KAM3) | ||
KARP | Keying and Authentication for Routing Protocols (KARP) | ||
KCI | Key Compromise Impersonation (KCI) | ||
KDA | Key Distribution Authority (KDA) | ||
KDC | Key Distribution Center (KDC) | ||
KDF | Key Derivation Function (KDF) | ||
KE | key establishment (KE) | ||
Key Exchange (KE) | |||
KEK | key encryption key (or key-encryption key) (KEK) | ||
KEM | Key Encapsulation Mechanism | ||
KIM | Key Identifier Mode (KIM) | ||
KINK | Kerberized Internet Negotiation of Keys (KINK) | ||
KLV | Key-Length-Value (KLV) | ||
KMP | Key Management Protocol (KMP) | ||
KMS | Key Management Service (KMS) | ||
KPAK | Key Management Service Public Authentication Key (KPAK) | ||
KPI | Key Performance Indicator (KPI) | ||
KPML | Key Press Markup Language (KPML) | ||
KSA | Key Source Authority (KSA) | ||
KSAK | Key Management Service Secret Authentication Key (KSAK) | ||
KSK | Key Signing Key (KSK) | ||
KTA | Key Trust Anchor (KTA) | ||
L2 | Layer 2 (L2) | ||
L2CAP | Logical Link Control and Adaptation Protocol (L2CAP) | ||
L2CP | Layer 2 Control Protocol (L2CP) | ||
L2F | Layer 2 Forwarding (L2F) | ||
L2NM | Layer 2 VPN Network Model (L2NM) | ||
L2SM | Layer 2 VPN Service Model (L2SM) | ||
L2SS | L2-Specific Sublayer (L2SS) | ||
L2TP | Layer 2 Tunneling Protocol (L2TP) | ||
L2VPN | * | Layer 2 Virtual Private Network (L2VPN) | |
L3 | Layer 3 (L3) | ||
L3NM | L3VPN Network Model (L3NM) | ||
L3SM | L3VPN Service Model (L3SM) | ||
L3VPN | * | Layer 3 Virtual Private Network (L3VPN) | |
L-LSP | Label-Only-Inferred-PSC LSP (L-LSP) | ||
LAALP | Local Active-Active Link Protocol (LAALP) | ||
LAC | L2TP Access Concentrator (LAC) | ||
LACNIC | * | Latin American and Caribbean Internet Addresses Registry (LACNIC) | |
LACP | Link Aggregation Control Protocol (LACP) | ||
LAG | Link Aggregation Group (LAG) | ||
LAMP | Link Aggregation Marker Protocol (LAMP) | ||
LAN | * | Local Area Network (LAN) | |
LATM | Low-overhead MPEG-4 Audio Transport Multiplex (LATM) | ||
LBR | LLN Border Router (LBR) | ||
LbyR | Location-by-Reference (LbyR) | ||
LbyV | Location-by-Value (LbyV) | ||
LC | Local Controller (LC) | ||
Link Connection (LC) | |||
Line Card (LC) | |||
LCAF | LISP Canonical Address Format (LCAF) | ||
LCAS | Link Capacity Adjustment Scheme (LCAS) | ||
LCCE | Logical Cluster Computing Environment (LCCE) | ||
L2TP Control Connection Endpoint | |||
LCG | Linear Congruential Generator (LCG) | ||
LCI | Location Configuration Information (LCI) | ||
LCP | Location Configuration Protocol (LCP) | ||
large content providers (LCP) | |||
Link Control Protocol (LCP) | |||
LCT | Layered Coding Transport (LCT) | ||
LDAP | Lightweight Directory Access Protocol (LDAP) | ||
LDH | letter-digit-hyphen (LDH) | ||
LDI | Link Down Indication (LDI) | ||
LDML | Locale Data Markup Language (LDML) | ||
LDN | Local Domain Name (LDN) | ||
LDP | * | Label Distribution Protocol (LDP) | |
LDPC | Low-Density Parity Check (LDPC) | ||
LDR | Link Delivery Ratio (LDR) | ||
LDRA | Lightweight DHCPv6 Relay Agent (LDRA) | ||
LE | Lower Effort (LE) | ||
Low Energy (LE) | |||
LEDBAT | Low Extra Delay Background Transport (LEDBAT) | ||
LEC | Loss Estimation Counter (LEC) | ||
Local Exchange Carrier (LEC) | |||
LER | Label Edge Router (LER) | ||
LF | * | Line Feed (LF) | |
LFA | Loop-Free Alternate (LFA) | ||
LFB | Logical Functional Block (LFB) | ||
Logical Function Block (LFB) | |||
LFE | Low Frequency Effects (LFE) | ||
LFIB | Label Forwarding Information Base (LFIB) | ||
LFN | Long Fat Network (LFN) | ||
Local Fixed Node (LFN) | |||
LFS | Label Format Specifier (LFS) | ||
LFSR | linear feedback shift register (LFSR) | ||
LGR | Label Generation Ruleset (LGR) | ||
LIB | Label Information Base (LIB) | ||
LIFO | last-in-first-out (LIFO) | ||
LIG | LISP Internet Groper (LIG) | ||
LIME | Layer-Independent OAM Management in the Multi-Layer Environment (LIME) | ||
LIP | Loop Initialization Primitive Sequence (LIP) | Pronounced “lip” | |
LIPA | Local IP Access (LIPA) | ||
LIR | Local Internet Registry (LIR) | ||
LIS | Location Information Server (LIS) | ||
LISP | Locator-Identifier Split Protocol (LISP) | ||
Locator/ID Separation Protocol (LISP) | |||
LKH | Logical Key Hierarchy (LKH) | ||
LLC | Logical Link Control (LLC) | ||
Local Link Connectivities (LLC) | |||
LLC_SAP | Logical Link Control Service Access Point (LLC_SAP) | ||
LLC/SNAP | Logical Link Control/Subnetwork Access Protocol (LLC/SNAP) | Pronounced “el el see snap” | |
LLCL | Local Link Connectivity List (LLCL) | ||
LLDP | Link Layer Discovery Protocol (LLDP) (ANSI/TIA-1057) | ||
LLDP-MED | Link Layer Discovery Protocol - Media Endpoint Discovery (LLDP-MED) | ||
LLID | Logical Link Identifier (LLID) | ||
LLME | Lower Layer Management Entity (LLME) | ||
LLMNR | Link-Local Multicast Name Resolution (LLMNR) | ||
LLN | Low-Power and Lossy Network (LLN) | ||
LLQC | Last Listener Query Count (LLQC) | ||
LLQI | Last Listener Query Interval (LLQI) | ||
LLQT | Last Listener Query Timer (LLQT) | ||
LLS | Link-Local Signaling (LLS) | ||
LM | Loss Measurement (LM) | ||
location management (LM) | |||
LMA | Local Mobility Anchor (LMA) | ||
LMAA | Local Mobility Anchor Address (LMAA) | ||
LMAP | Large-scale Measurement of Broadband Performance (LMAP) | ||
LMDS | Local Multipoint Distribution Service (LMDS) | ||
LMP | Link Management Protocol (LMP) | ||
LMQC | Last Member Query Count (LMQC) | ||
LMQI | Last Member Query Interval (LMQI) | ||
LMQT | Last Member Query Timer (LMQT) | ||
LMR | Last Matching Rule (LMR) | ||
LMTP | Local Mail Transfer Protocol (LMTP) | ||
LNE | logical network element (LNE) | ||
LO | Leading Only (LO) | ||
LOC | loss of continuity (LOC) | ||
Loc-RIB | * | No expansion | |
LOPS | Loss of Packet Synchronization (LOPS) | ||
LORAN-C | Long Range Navigation System Version C (LORAN-C) | ||
LoST | Location-to-Service Translation (LoST) | ||
LoWPAN | Low-Power Wireless Personal Area Network (LoWPAN) | ||
LPC | linear-predictive coding (LPC) | ||
LPM | Longest Prefix Match (LPM) | ||
LPWAN | Low-Power WAN (LPWAN) | ||
LQI | Link Quality Indication (LQI) | ||
LRA | Localized Routing Acknowledge (LRA) | ||
Local Registration Authority (LRA) | |||
LRDD | Link-based Resource Descriptor Document (LRDD) | ||
LRI | Localized Routing Initialization (LRI) | ||
LRM | Link Resource Manager (LRM) | ||
LRR | Layer Refresh Request (LRR) | ||
LRU | Least Recently Used (LRU) | ||
LS | Lip Synchronization (LS) | ||
LSA | Link State Advertisement (LSA) | ||
LSAP | Link Service Access Point (LSAP) | ||
LSB | least significant bit (LSB) | ||
Locator-Status-Bit (LSB) | |||
LSC | Link State Control (LSC) | ||
Lambda Switch Capable (LSC) | |||
Lambda Switching Capable (LSC) | |||
LSDB | Link State Database (LSDB) | ||
LSE | Label Stack Entry (LSE) | ||
LSF | Line Spectral Frequency (LSF) | ||
LSI | Local Scope Identifier (LSI) | ||
LSM | Label Switched Multicast (LSM) | ||
LSN | Large-Scale NAT (LSN) | ||
LSP | Label Switched Path (LSP) | ||
Label Switching Path (LSP) | Rarely used | ||
Link State Packet (LSP) | |||
Link State PDU (LSP) (or Link State Protocol Data Unit) | Link State PDU whenever referring to IS-IS | ||
Location Service Provider (LSP) | |||
LSPA | LSP Attributes (LSPA) | ||
LSPDB | Link State PDU Database (LSPDB) | ||
LSR | Label Switching Router (LSR) | ||
Loose Source Routing (LSR) | |||
LSRR | Loose Source and Record Route (LSRR) | ||
LSU | Link State Update (LSU) | ||
LSW | Least Significant Word (LSW) | ||
LTE | * | Long Term Evolution (LTE) | No hyphen; not our term to define |
LTP | Licklider Transmission Protocol (LTP) | ||
Link Termination Point (LTP) | |||
LU | Logical Unit (LU) | ||
LUN | Logical Unit Number (LUN) | ||
LW-IGMPv3 | Lightweight IGMPv3 (LW-IGMPv3) | ||
LW-MLDv2 | Lightweight MLDv2 (LW-MLDv2) | ||
lw4o6 | Lightweight 4over6 (lw4o6) | ||
LW46 | LightWeight 46 (LW46) | ||
lwAFTR | Lightweight AFTR (lwAFTR) | ||
lwB4 | Lightweight B4 (lwB4) | ||
LwM2M | Lightweight Machine-to-Machine (LwM2M) | ||
LWSP | linear whitespace (LWSP) | ||
LZ77 | Lempel-Ziv (LZ77) | ||
LZQ | Lempel-Ziv-Welch (LZQ) | ||
M2M | machine-to-machine (M2M) | ||
mAFTR | Multicast AFTR (mAFTR) | ||
mB4 | Multicast Basic Bridging BroadBand (mB4) | ||
MA | Multicast Acquisition (MA) | ||
multiple attachment (MA) | |||
Measurement Agent (MA) | |||
Maintenance Association (MA) | |||
MA/RA | Maintenance Agency/Registration Authority (MA/RA) | ||
MAC | Media Access Control (MAC) | ||
Medium Access Control (MAC) | Media/Medium dependent upon plural/singular. | ||
Message Authentication Code (MAC) | Legacy cryptographic terminology | ||
Mandatory Access Control (MAC) | |||
MACE | Middleware Architecture Committee for Education (MACE) | ||
MACsec | Media Access Control Security (MACsec) | ||
MAE | Metropolitan Area Ethernet (MAE) | ||
MAG | Mobile Access Gateway (MAG) | ||
MAID | Maintenance Association Identifier (MAID) | ||
MAN | * | Metropolitan Area Network | |
MANET | Mobile Ad Hoc Network (MANET) | ||
MAP | Mobility Anchor Point (MAP) | ||
Mobile Application Part (MAP) | |||
MAP-E | Mapping of Address and Port with Encapsulation (MAP-E) | ||
MAP-T | Mapping of Address and Port using Translation (MAP-T) | ||
MAS | Mobile Access Station (MAS) | ||
MASA | Manufacturer Authorized Signing Authority (MASA) | ||
MBB | Make-Before-Break (MBB) | ||
MBGP | Multicast BGP (MBGP) | ||
Multiprotocol BGP (MBGP) | |||
MBMS | Multimedia Broadcast/Multicast Service (MBMS) | ||
MBZ | Must Be Zero (MBZ) | ||
MC | Motion Compensation (MC) | ||
Media Consumer (MC) | |||
MC-LAG | Multi-Chassis Link Aggregation (MC-LAG) | ||
MCA | Multiple Call Appearance (MCA) | ||
MCC | Mobile Country Code (MCC) | ||
Management Communication Channel (MCC) | |||
MCLT | Maximum Client Lead Time (MCLT) | ||
MCMS | Multimedia Cable Network System (MCNS) | ||
MCS | Modulation and Coding Scheme (MCS) | ||
MCU | Multipoint Control Unit (MCU) | ||
Microcontroller Unit (MCU) | |||
MD | Maintenance Domain (MD) | ||
Metadata (MD) | |||
MD5 | * | Message Digest 5 | Typically not expanded |
MDA | Mail Delivery Agent (MDA) | ||
MDC | Modification Detection Code (MDC) | ||
MDHT | Multi-level Distributed Hash Table (MDHT) | ||
MDL | maximum datagram lifetime (MDL) | ||
mDNS | Multicast DNS (mDNS) | ||
MDNs | Message Disposition Notifications (MDNs) | ||
MDRR | Maximum Data Rate (Receive) (MDRR) | ||
MDRT | Maximum Data Rate (Transmit) (MDRT) | ||
MDS | Maximal Separable Distance (MDS) | ||
MetaData Server (MDS) | |||
MDSC | Multi-Domain Service Coordinator (MDSC) | ||
MDT | Multicast Distribution Tree (MDT) | ||
ME | Maintenance Entity (ME) | ||
MED | Multi-Exit Discriminator (MED) | ||
MEDIACTRL | * | Media Server Control (MEDIACTRL) | |
MEF | MEF Forum (MEF) | No longer “Metro Ethernet Forum (MEF)”) | |
MEG | Maintenance Entity Group (MEG) | ||
MEID | Mobile Equipment Identity (MEID) | ||
MELPe | Mixed Excitation Linear Prediction Enhanced (MELPe) | ||
MEP | Maintenance Entity Group End Point (MEP) | ||
Maintenance End Point (MEP) | |||
MES | Manufacturing Execution System (MES) | ||
MF | More Fragments (MF) | ||
MFIB | Multicast Forwarding Information Base (MFIB) | ||
MG | Media Gateway (MG) | ||
MGC | Media Gateway Controller (MGC) | ||
MGCP | Media Gateway Control Protocol (MGCP) | ||
MGF | mask generation function (MGF) | ||
MGM | Multilinear Galois Mode (MGM) | ||
MHAE | Mobile-Home Authentication Extension (MHAE) | ||
MHD | multihomed device (MHD) | ||
MHN | multihomed network (MHN) | ||
MHP | Multimedia Home Platform (MHP) | ||
Multi-Homed Prefix (MHP) | |||
MHS | Mail Handling Service (MHS) | ||
Message Handling Service (MHS) | |||
Message Handling System (MHS) | |||
MI-PMSI | Multidirectional Inclusive PMSI (MI-PMSI) | ||
MIB | * | Management Information Base (MIB) | |
MIC | Message Integrity Check (MIC) | ||
Message Integrity Code (MIC) | |||
MID | Media Identification (MID) | ||
MIDCOM | Middlebox Communications (midcom) | ||
MIDI | MIDI (Musical Instrument Digital Interface) | Typically not expanded. If expanded, make MIDI primary, that is, use “MIDI (Musical Instrument Digital Interface)”, not “Musical Instrument Digital Interface (MIDI)”; per RFC Editor note for RFCs 4695 and 4696 | |
MIF | multiple interfaces (MIF) | ||
MIKEY | Multimedia Internet KEYing (MIKEY) | ||
MIMD | Multiplicative-Increase Multiplicative-Decrease (MIMD) | ||
MIME | * | Multipurpose Internet Mail Extensions (MIME) | |
MIMO | Multiple Input Multiple Output (MIMO) | ||
MIN | Mobile Identification Number (MIN) | ||
MINC | multicast inference of network characteristics (MINC) | ||
MINE | Minimal Encapsulation in IP (MINE) | ||
MIP | Mobile IP (MIP) | ||
Maintenance Entity Group Intermediate Point (MIP) | |||
Maintenance Intermediate Point (MIP) | |||
MIPv6/MIP6 | Mobile IPv6 (MIPv6 or MIP6) | ||
MIPS | * | Million Instructions Per Second (MIPS) | |
MITM | man in the middle (MITM) | Typically hyphenated as an adjective before a noun | |
MKI | Master Key Identifier (MKI) | ||
MKT | Master Key Tuple (MKT) | ||
ML | Metadata Label (ML) | ||
Machine Learning (ML) | |||
MLA | Multiple Call Line Appearance (MLA) | ||
MLD | Multicast Listener Discovery (MLD) | ||
MLDv2 | Multicast Listener Discovery Version 2 (MLDv2) | ||
mLDP | Multipoint LDP (mLDP) | Per guidance, intentionally not as in RFC 6388 (mLDP: Multipoint extensions for LDP) | |
MLDv2 | Multicast Listener Discovery Version 2 (MLDv2) | ||
MLE | Mesh Link Establishment (MLE) | ||
MLI | Message Length Indicator (MLI) | ||
Metadata Label Indicator (MLI) | |||
MLM | Mailing List Manager (MLM) | ||
MLPP | Multilevel Precedence and Preemption (MLPP) | ||
MLS | Multi-Level Secure (MLS) | ||
Multi-Level Security (MLS) | |||
MM | Mobility Management (MM) | ||
MMA | MIDI Manufacturers Association | ||
MMDEF | Malware Metadata Exchange Format (MMDEF) | ||
MME | Mobile Management Entity (MME) | ||
Mobility Management Entity (MME) | |||
MMORPG | Massively Multiplayer Online Role-Playing Game (MMORPG) | ||
MMRP | Multiple MAC Registration Protocol (MMRP) | ||
MMS | Multimedia Messaging Service (MMS) | ||
mMTC | massive Machine Type Communications (mMTC) | ||
MN | Mobile Node (MN) | ||
MN-FA | Mobile Node - Foreign Agent (MN-FA) | ||
MNC | Mobile Network Code (MNC) | ||
MNG | Mobile Network Gateway (MNG) | ||
MO | Measurement Object (MO) | ||
MOBIKE | IKEv2 Mobility and Multihoming (MOBIKE) | ||
MoCA | Multimedia over Coax Alliance (MoCA) | ||
MODP | modular exponentiation (MODP) | often MODP group | |
MOP | Mode of Operation (MOP) | ||
MOS | mean opinion score (MOS) | ||
MOSPF | Multicast Extensions to OSPF (MOSPF) | ||
MP | Multiprotocol (MP) | ||
Maintenance Point (MP) | |||
Merge Point (MP) | Also “MPT” in this list | ||
Media Provider (MP) | |||
MP-BGP | Multiprotocol BGP (MP-BGP) | ||
MP2P | Multi-Point to Point (MP2P) | ||
MP2PE | Multi-Point to Point Emulation (MP2PE) | ||
MP2MP | Multipoint-to-Multipoint (MP2MP) | ||
MPA | Marker PDU Aligned (MPA) Framing for TCP | ||
MPD | Media Presentation Description (MPD) | ||
MPEG | * | Motion Picture Experts Group (MPEG) | Typically not expanded |
MPEG-DASH | MPEG Dynamic Adaptive Streaming over HTTP (MPEG-DASH) | Synonymous with DASH | |
MPI | Minimum Picture Interval (MPI) | ||
Multiprecision Integer (MPI) | |||
Metadata Present Indicator (MPI) | |||
MPL | Multicast Protocol for Low-Power and Lossy Networks (MPL) | ||
MPLS | * | Multiprotocol Label Switching (MPLS) | Use “Multiprotocol” wherever “Multi Protocol” or “MultiProtocol” occur (RFC 3031, et al.) NOT “Multiprotocol Label Switched” per EID 7892 |
MPLS-TE | * | MPLS Traffic Engineering (MPLS-TE) | |
MPLS-TP | MPLS Transport Profile (MPLS-TP) | ||
MPNTP | Multipath Network Time Protocol (MPNTP) | ||
MPPTP | Multipath Precision Time Protocol (MPPTP) | ||
MPR | multipoint relay (MPR) | ||
MPS | Maximum Packet Size (MPS) | ||
MPT | Merge Point (MPT) | ||
MPTCP | Multipath TCP (MPTCP) | ||
MQTT | Message Queuing Telemetry Transport (MQTT) | ||
MR | Mobile Router (MR) | ||
Map Resolver (MR) | |||
MRB | Media Resource Broker (MRB) | ||
MRD | Multicast Router Discovery (MRD) | ||
MRIB | Multicast Routing Information Base (MRIB) | ||
MRRU | Maximum Reconstructed Reception Unit (MRRU) | ||
MRT | Multi-threaded Routing Toolkit (MRT) | ||
Maximally Redundant Tree (MRT) | |||
MRTG | Multi Router Traffic Grapher (MRTG) | ||
MRU | Maximum Receive Unit (MRU) | ||
MS | Media Server (MS) | ||
Mobile Station (MS) | |||
Message Store (MS) | |||
Manual Switch (MS) | |||
MS-PW | Multi-Segment Pseudowire (MS-PW) | ||
MSA | Mail Submission Agent (MSA) | ||
Message Submission Agent (MSA) | |||
Mobility Service Authorizer (MSA) | |||
MSB | most significant bit (MSB) | ||
MSC | Mobile Switching Center (MSC) | ||
MSCML | Media Server Control Markup Language (MSCML) | ||
MSD | Maximum SID Depth (MSD) | ||
MSDP | Multicast Source Discovery Protocol (MSDP) | ||
MSID | Media Stream Identifier (MSID) | ||
MSISDN | Mobile Station International Subscriber Dial Number (MSISDN) | ||
Mobile Subscriber Integrated Services Digital Network number (MSISDN) | |||
MSL | maximum segment lifetime (MSL) | ||
MSM | Mobile Station Modem (MSM) | ||
MSML | Media Server Markup Language (MSML) | ||
MSN | Master Sequence Number (MSN) | ||
MSP | Mail Service Provider (MSP) | ||
Mapping Service Provider (MSP) | |||
MSRP | Message Session Relay Protocol (MSRP) | ||
MSS | Maximum Segment Size (MSS) | ||
Mobile Support Station (MSS) | |||
MSTI | Multiple Spanning Tree Instance (MSTI) [802.1q] | ||
MSTP | Multiple Spanning Tree Protocol (MSTP) | ||
Mobility Service Transport Protocol (MSTP) | |||
MSW | Most Significant Word (MSW) | ||
MT | Message Transfer (MT) | ||
Mobile Terminal (MT) | |||
Multiplier (MT) | |||
Multi-Topology (MT) | |||
Mersenne Twister (MT) | |||
MTA | Mail Transport Agent (MTA) | ||
Mail Transfer Agent (MTA) | |||
Message Transfer Agent (MTA) | |||
MTLS | Mutual TLS (MTLS) | ||
MTTR | mean time to repair (MTTR) | ||
MTU | * | Maximum Transmission Unit (MTU) | |
MTU-s | Multi-Tenant Unit switch (MTU-s) | ||
MU | Merging Unit (MU) | ||
MUA | Mail User Agent (MUA) | ||
Message User Agent (MUA) | |||
MUC | Multi-User Chat (MUC) | ||
MUD | Manufacturer Usage Description (MUD) | ||
MV | Medium Voltage (MV) | ||
MVPN | Multicast VPN (MVPN) | ||
MVRP | Multiple VLAN Registration Protocol (MVRP) | IEEE 802.1ak | |
MWI | Message-Waiting Indicator (MWI) | ||
MXF | Material Exchange Format (MXF) | ||
N-PE | Network-facing PE (N-PE) | ||
NA | Neighbor Advertisement (NA) | ||
NAA | Network Address Authority (NAA) | ||
NACK | * | Negative ACKnowledgement | |
NACM | NETCONF Access Control Model (NACM) | ||
NADA | Network-Assisted Dynamic Adaptation (NADA) | ||
NAI | Network Access Identifier (NAI) | ||
NAL | Network Abstraction Layer (NAL) | ||
NANPA | North American Numbering Plan Administration (NANPA) | ||
NAPT | * | Network Address Port Translator (NAPT) | |
* | Network Address and Port Translator (NAPT) | Can use Translator or Translation; both are fine. | |
NAPTR | * | Naming Authority Pointer (NAPTR) | Resource Record |
NAR | New Access Router (NAR) | ||
NAS | Network Access Server (NAS) | ||
Network-Attached Storage (NAS) | |||
NASREQ | Network Access Server Requirements (NASREQ) | ||
NAT | * | Network Address Translation (NAT) | |
* | Network Address Translator (NAT) | ||
NAT64 | Network Address and Protocol Translation from IPv6 Clients to IPv4 Servers (NAT64) | as in RFC 6146, per guidance | |
NAT64-CGN | NAT64 Carrier-Grade NAT (NAT64-CGN) | ||
NAT64-FE | NAT64 server Front End (NAT64-FE) | ||
NAT-PMP | NAT Port Mapping Protocol (NAT-PMP) | ||
NAT-PT | Network Address Translation - Protocol Translation (NAT-PT) | ||
Network Address Translator - Protocol Translator (NAT-PT) | |||
NAT-T | Network Address Translation Traversal (NAT-T) | ||
NBMA | Non-Broadcast Multi-Access (NBMA) | ||
NC | Neighbor Cache (NC) | ||
NC | Network Controller (NC) | ||
NCE | Network Connection Endpoint (NCE) | ||
Neighbor Cache Entry (NCE) | |||
NCP | Network Control Protocol (NCP) | ||
NCR | Non-Congestion Robustness (NCR) | ||
NCS | Network Control Signaling (NCS) | ||
ND | Neighbor Discovery (ND) | ||
NDF | Non-Designated Forwarder (NDF) | ||
NDN | Named Data Networking (NDN) | ||
NDP | Neighbor Discovery Protocol (NDP) | ||
Neighbor Discovery Process (NDP) | |||
NE | Network Element (NE) | ||
NEA | Network Endpoint Assessment (NEA) | ||
NEMO | Network Mobility (NEMO) | ||
NENA | National Emergency Number Association (NENA) | ||
NETCONF | Network Configuration Protocol (NETCONF) | Not typically expanded in titles, but expand in abstract. | |
NetInf | Network of Information (NetInf) | ||
NEWPRED | * | No expansion | Refers to error resilience in MPEG-4 version 2 regarding which frame should be used as the reference for the next prediction. |
NF | Network Function (NF) | ||
NFC | Normalization Form C (NFC) | Unicode Normalization Form C | |
Near Field Communication (NFC) | |||
NFKC | Normalization Form KC (NFKC) | ||
NFS | * | Network File System (NFS) | |
NFV | Network Function Virtualization (NFV) | ||
NFVI | NFV Infrastructure (NFVI) | ||
NGN | Next Generation Network (NGN) | ||
NGW | Network Gateway (NGW) | ||
NHC | Next Header Compression (NHC) | ||
NHDP | Neighborhood Discovery Protocol (NHDP) | ||
NHLFE | Next Hop Label Forwarding Entry (NHLFE) | ||
NI | Named Information (NI) | ||
network instance (NI) | |||
NIC | Network Interface Card (NIC) | ||
Network Information Center (NIC) | as in AfriNIC, APNIC, LACNIC | ||
Network Interface Controller (NIC) | |||
NID | Network Interface device (NID) | ||
Network Identifier (NID) | |||
Namespace Identifier (NID) | |||
NIDS | Network Intrusion Detection System | ||
NIH | Named Information for Humans (NIH) | ||
NIR | National Internet Registry (NIR) | ||
NIS | Network Information Service (NIS) | ||
NIST | * | National Institute of Standards and Technology (NIST) | |
NLM | Network Lock Manager (NLM) | ||
NLP | nonlinear processing (NLP) | ||
NLPID | Network Layer Protocol Identifier (NLPID) | ||
NLRI | Network Layer Reachability Information (NLRI) | ||
nMAG | new Mobility Access Gateway (nMAG) | ||
NMDA | Network Management Datastore Architecture (NMDA) | ||
NME | Network Management Entity (NME) | ||
NMP | Network Musical Performance (NMP) | ||
NMS | Network Management System (NMS) | ||
Network Management Station (NMS) | |||
NNI | Network-Network Interface (NNI) | ||
NNTP | Network News Transfer Protocol (NNTP) | ||
NOC | Network Operations Center (NOC) | ||
NOP | No Operation (NOP) | ||
NORM | NACK-Oriented Reliable Multicast (NORM) | ||
NOS/OLS | Not_Operational Primitive Sequence / Offline Primitive Sequence (NOS/OLS) | ||
NoSQL | * | No expansion | While SQL stands for “Structured Query Language”, there's no definitive expansion for “No”. |
NP | * | nondeterministic polynomial (NP) time | |
NPDAO | No-Path Destination Advertisement Object (NPDAO) | ||
NPT | Normal Play Time (NPT) | ||
NPTv6 | IPv6-to-IPv6 Network Prefix Translation (NPTv6) | ||
NPU | Network Processing Unit (NPU) | ||
NR-LDH | Non-Reserved LDH (NR-LDH) | ||
NREN | National Research and Education Network (NREN) | ||
NRPN | Non-Registered Parameter Numbers (NRPN) | The plural is used in MIDI documents | |
NRS | Name Resolution Service (NRS) | ||
NRZ | Non-Return-to-Zero (NRZ) | ||
NS | * | No expansion | As in “NS simulator” is network simulator, but should not be expanded. |
Neighbor Solicitation (NS) | |||
NSA | National Security Agency (NSA) | ||
NSAP | Network Service Access Protocol (NSAP) | ||
Network Service Access Point (NSAP) | |||
NSC | Network Simulation Cradle (NSC) | ||
NSCP | Name Server Control Protocol (NSCP) | ||
NSD | * | No expansion (was: Name Server Daemon) | Per guidance for RFC 7706 |
NSE | Named Signaling Event (NSE) | ||
NSEC | * | NextSECure (NSEC) | |
NSF | * | National Science Foundation (NSF) | |
NSH | Network Service Header (NSH) | ||
NSI | non-service initialized (NSI) | ||
NSID | Name Server Identifier (NSID) | ||
NSIS | Next Steps in Signaling (NSIS) | ||
NSLP | NSIS Signaling Layer Protocol (NSLP) | ||
NSP | native service processing (NSP) | ||
Network-Specific Prefix (NSP) | |||
Network Service Provider (NSP) | |||
NSR | Non-Stop Routing (NSR) | ||
NSS | Namespace Specific String (NSS) | ||
Number of Source Symbols (NSS) | |||
National Security System (NSS) | |||
Name Service Switch (NSS) | |||
NSSA | Not-So-Stubby Area (NSSA) | ||
NTFS | New Technology File System (NTFS) | ||
NTP | * | Network Time Protocol (NTP) | |
NTSC | * | National Television Standards Committee (NTSC) | |
NUD | Neighbor Unreachability Discovery (NUD) | ||
NUT | Network Under Test (NUT) | ||
NVA | Network Virtualization Authority (NVA) | ||
NVC | Number of Virtual Components (NVC) | ||
NVE | Network Virtualization Edge (NVE) | ||
NVFS | Network Virtual File System (NVFS) | ||
NVGRE | Network Virtualization Using Generic Routing Encapsulation (NVGRE) | ||
NVT | Network Virtual Terminal (NVT) | ||
NVO | Network Virtualization Overlay (NVO) | ||
NVO3 | Network Virtualization over Layer 3 (NVO3) | ||
NVT | Network Virtual Terminal (NVT) | ||
NWK | Network Layer (NWK) | ||
OA | Ordered Aggregate (OA) | ||
OACK | Option Acknowledgment (OACK) | ||
OAM | Operations, Administration, and Maintenance (OAM) | BCP 161, RFC 6291 | |
OASIS | Organization for the Advancement of Structured Information Standards (OASIS) | ||
OATC | Open Authentication Technology Committee (OATC) | ||
OAuth | * | No expansion | More of a name rather than an abbreviation |
O&M | OAM and Management (O&M) | BCP 161, RFC 6291 | |
OC | Ordinary Clock (OC) | ||
OCB | * | No expansion | Was initially an acronym of Offset Codebook but is now the algorithm's full name; see RFC 7253. |
OCF | Open Connectivity Foundation (OCF) | ||
OCh | Optical Channel (OCh) | ||
OCP | Objective Code Point (OCP) | ||
OCR | optical character recognition (OCR) | ||
OCRP | Outgoing-Call-Reply (OCRP) | ||
OCRQ | Outgoing-Call-Request (OCRQ) | ||
OCSP | Online Certificate Status Protocol (OCSP) | ||
ODU | Optical Data Unit (ODU) | ||
ODM | Original Device Manufacturer (ODM) | ||
OEM | original equipment manufacturer (OEM) | ||
OEO | optical-electronic-optical (OEO) | ||
OF | Objective Function (OF) | ||
OFB | Output FeedBack (OFB) | ||
OFDM | Orthogonal Frequency Division Multiplexing (OFDM) | ||
oFIB | ordered forwarding information base (oFIB) | ||
OGA | ORCHID Generation Algorithm (OGA) | ||
OGC | Open Geospatial Consortium (OGC) | ||
OGF | Open Grid Forum (OGF) | ||
OID | * | Object Identifier (OID) | |
OIF | Outgoing Interface (OIF) | ||
OIPF | Open IPTV Forum (OIPF) | ||
OKM | Output Keying Material (OKM) | ||
OLS | Optical Line System (OLS) | ||
OLSR | Optimized Link State Routing (OLSR) | ||
OLT | Optical Line Terminal (OLT) | Server unit of the EPON | |
OM | Overlay Multicast (OM) | ||
OMA | Open Mobile Alliance (OMA) | ||
OMAP | Online Multimedia Authorization Protocol (OMAP) | ||
OMP | Optical Multi-Point (OMP) | ||
ONC | Open Network Computing (ONC) | ||
OOMF | Overload Originated Multi-destination Frame (OOMF) | ||
OpenPGP | * | No expansion | |
OPES | Open Pluggable Edge Services (OPES) | ||
OPEX | Operating Expenses (OPEX) | ||
Operational Expenditure (OPEX) | |||
OPML | Outline Processor Markup Language (OPML) | ||
OPRF | Oblivious Pseudorandom Function (OPRF) | ||
ORCHID | Overlay Routable Cryptographic Hash Identifiers (ORCHID) | ||
ORO | Option Request Option (ORO) | ||
ORR | Optimal Route Reflection (ORR) | ||
ORS | OID Resolution Service (ORS) | ||
OS | * | Operating System (OS) | |
Outbound Streams (OS) | |||
Opportunisitic Security (OS) | |||
OSCORE | Object Security for Constrained RESTful Environments (OSCORE) | ||
OSI | * | Open Systems Interconnection | |
OSN | Original Sequence Number (OSN) | ||
OSPF | * | Open Shortest Path First (OSPF) | routing protocol |
OSRTP | Opportunistic Secure Real-time Transport Protocol (OSRTP) | ||
OSS | Operational Support System (OSS) | ||
Operations Support System (OSS) | |||
OSSI | Open Source Software Institute (OSSI) | ||
OT | Operation Technology (OT) | ||
Operational Technology (OT) | |||
OTAF | Over-the-Air Functionality (OTAF) | ||
OTASP | Over-the-Air Service Provisioning (OTASP) | ||
OTI | Object Transmission Information (OTI) | ||
OTN | Optical Transport Network (OTN) | ||
organization taxpayer number (OTN) | |||
OTP | One-Time Password (OTP) | ||
OTT | Over the Top (OTT) | ||
OU | Organizational Unit (OU) | ||
OUI | Organizationally Unique Identifier (OUI) | ||
OVN | Open Virtual Networking (OVN) | ||
OVS | Open vSwitch (OVS) | ||
OWAMP | One-Way Active Measurement Protocol (OWAMP) | ||
OWD | One-Way Delay (OWD) | ||
OWE | Opportunistic Wireless Encryption (OWE) | ||
OWS | optional whitespace (OWS) | ||
OXC | Optical Cross-Connect (OXC) | ||
P | Provider (P) | ||
P-GW | Packet Data Network Gateway (P-GW) | ||
P-PCE | Parent PCE (P-PCE) | ||
P2C | provider-to-customer (P2C) | ||
P2MP | Point-to-Multipoint (P2MP) | ||
Peer-to-Multipeer | |||
P2C | provider-to-customer (P2C) | ||
P2P | peer-to-peer (P2P) | ||
point-to-point (P2P) | |||
P2PE | Point-to-Point Emulation (P2PE) | ||
P2PSIP | Peer-to-Peer SIP (P2PSIP) | ||
P3P | Platform for Privacy Preferences (P3P) | ||
PA | provider-aggregated (PA) | ||
provider assigned (PA) | |||
Posture Attribute (PA) | |||
PaaS | Platform as a Service (PaaS) | ||
PAA | PANA Authentication Agent | ||
PaC | PANA Client (PaC) | ||
PAC | * | Proxy Auto-Configuration (PAC) | Not typically expanded; e.g., “the PAC file” or “Microsoft PAC” |
PPTP Access Concentrator (PAC) | |||
privilege attribute certificate (PAC) | |||
PACE | Password Authenticated Connection Establishment (PACE) | ||
PAD | Peer Authorization Database (PAD) | ||
principal authentication data (PAD) | |||
PAG | Policy Association Group (PAG) | ||
PAI | P-Asserted-Identity (PAI) | ||
PAKE | password-authenticated key exchange (PAKE) | ||
PAL | * | Phase Alternation Line | |
Package Availability List (PAL) | |||
PANA | Protocol for Carrying Authentication for Network Access | ||
PAR | previous access router (PAR) | ||
Pushed Authorization Request (PAR) | |||
PASSporT | Personal Assertion Token (PASSporT) | ||
PAT | Port Address Translation (PAT) | ||
Policy Association Type (PAT) | |||
PAWS | Protocol to Access White-Space (PAWS) Databases | ||
Protection Against Wrapped Sequences (PAWS) | |||
PB | Provider Bridge (PB) | IEEE 802.1ad | |
Posture Broker | |||
PBA | Proxy Binding Acknowledgement (PBA) | ||
PBAC | Policy-Based Admission Control (PBAC) | ||
PBB | Provider Backbone Bridge (PBB) (or Bridging) | IEEE 802.1ah | |
PBBN | Provider Backbone Bridged Network | ||
PBKDF | Password-Based Key Derivation Function (PBKDF) | ||
PBKDF2 | Password-Based Key Derivation Function 2 (PBKDF2) | ||
PBU | Proxy Binding Update (PBU) | ||
PBX | Private Branch Exchange (PBX) | ||
PC | Protocol Controller (PC) | ||
Posture Collector (PC) | |||
PCAP | Packet Capture (PCAP) | ||
PCAP-NG | PCAP Next Generation (PCAP-NG) | ||
PCB | Payload Confidentiality Block (PCB) | ||
Protocol Control Block (PCB) | |||
PCC | Path Computation Client (PCC) | ||
Policy and Charging Control (PCC) | |||
PCE | * | Path Computation Element (PCE) | |
PCECC | PCE as a Central Controller (PCECC) | ||
PCED | PCE Discovery (PCED) | ||
PCEP | Path Computation Element Communication Protocol (PCEP) | ||
PCIM | Policy Core Information Model (PCIM) | ||
PCM | * | Pulse Code Modulation (PCM) | Noun |
* | Pulse Code Modulated (PCM) | Adjective | |
PCMU | * | Pulse Coded Modulation | Pronounced 'mu-law'. Not typically expanded. |
PCN | Pre-Congestion Notification | ||
PCO | Protocol Configuration Option (PCO) | ||
PCP | Port Control Protocol (PCP) | ||
PCR | Path Control and Reservation (PCR) | ||
PCRE | Perl Compatible Regular Expressions (PCRE) | ||
PCRF | Policy and Charging Rule Function (PCRF) | ||
PD | Prefix Delegation | ||
PDA | * | Personal Digital Assistant | |
PDC | * | Personal Digital Cellular | Mobile phone standard. Similar to CDMA; do not expand |
* | Portable Document Format (PDF) | ||
PDH | Plesiochronous Digital Hierarchy (PDH) | ||
PDM | Performance and Diagnostic Metrics (PDM) | ||
PDN | Packet Data Network (PDN) | ||
PDN-GW | Packet Data Network Gateway (PDN-GW) | ||
PDP | Packet Data Protocol (PDP) | ||
PDS | Parameter Data Structure (PDS) | ||
PDSN | Packet Data Serving Node (PDSN) | ||
PDU | * | Packet Data Unit | |
Protocol Data Unit | |||
Power Distribution Unit (PDU) | |||
PDV | Packet Delay Variation (PDV) | ||
PE | Provider Edge (PE) | ||
PEAP | Protected Extensible Authentication Protocol (PEAP) | ||
PEF | Packet Elimination Function (PEF) | ||
PEG | Parsing Expression Grammar (PEG) | ||
PEM | Privacy-Enhanced Mail (PEM) | ||
PEM1 | * | No expansion | PEM-1 is not an abbreviation, it is an acronym, and cannot be expanded |
PEN | Private Enterprise Number (PEN) | ||
PEP | Policy Enforcement Point (PEP) | ||
Performance Enhancing Proxy (PEP) | |||
PER | Packed Encoding Rules (PER) | ||
PERA | Purdue Enterprise Reference Architecture (PERA) | ||
PERC | Private Media in Privacy-Enhanced RTP Conferencing (PERC) | ||
PETR | Proxy Egress Tunnel Router (PETR) | ||
PEX | Peer Exchange (PEX) | ||
PFL | Pruned Flood List (PFL) | ||
PFS | Perfect Forward Secrecy (PFS) | ||
PFX | Personal inFormation eXchange (PFX) | ||
PGM | Pragmatic General Multicast (PGM) | ||
PGP | Pretty Good Privacy (PGP) | ||
PGW | Packet Data Network Gateway (PGW) | ||
PHB | Per-Hop Behavior (PHB) | ||
PHIB | Previous Hop Insertion Block (PHIB) | ||
PHOP | previous hop (PHOP) | ||
PHP | Penultimate Hop Popping (PHP) | ||
PHR | Per Hop Reservation (PHR) | ||
PHY | Physical Layer (PHY) | ||
PI | Provider Independent (PI) | ||
Protocol Instantiation (PI) | |||
protocol interpreter (PI) | |||
Policy Identifier (PI) | |||
PIB | Payload Integrity Block (PIB) | ||
PIC | Prefix Independent Convergence (PIC) (commonly BCP PIC) | ||
PID | Provider-defined Identifier (PID) | ||
Packet ID (PID) | |||
PIDF | Presence Information Data Format (PIDF) | ||
PIDF-LO | Presence Information Data Format Location Object (PIDF-LO) | ||
PIE | Proportional Integral controller Enhanced (PIE) | ||
PII | Personally Identifiable Information (PII) | ||
PIM | * | Protocol Independent Multicast | |
PIM-DM | PIM - Dense Mode (PIM-DM) | ||
PIM-SM | PIM - Sparse Mode (PIM-SM) | ||
PIM-SSM | * | PIM Source-Specific Multicast (PIM-SSM) | |
PIN | * | Personal Identification Number (PIN) | |
PIO | Prefix Information Option (PIO) | ||
PIT | Pending Interest Table (PIT) | ||
PITM | person in the middle (PITM) | Typically hyphenated when used as an adjective before a noun | |
PITR | Proxy Ingress Tunnel Router (PITR) | ||
PK | public key (PK) | ||
PKCE | Proof Key for Code Exchange (PKCE) | ||
PKCS | * | Public-Key Cryptography Standards (PKCS) | Remove the expansion if it refers to series of standards, e.g., PKCS #8 |
PKG | Private Key Generator (PKG) | ||
PKI | * | Public Key Infrastructure (PKI) | |
PKINIT | Public Key Cryptography for Initial Authentication in Kerberos (PKINIT) | ||
PKIX | * | Public Key Infrastructure using X.509 | |
PL | Protocol Layer (PL) | ||
Packetization Layer (PL) | |||
PLAT | provider-side translator (PLAT) | ||
PLC | Packet Loss Concealment (PLC) | ||
Policy (Rule) Lifetime Change (PLC) | |||
Power Line Communication (PLC) | |||
Programmable Logic Controller (PLC) | |||
PLCP | Physical Layer Convergence Procedure (PLCP) | ||
PLI | Picture Loss Indication (PLI) | ||
PLR | Point of Local Repair (PLR) | ||
Packet Loss Rate (PLR) | |||
PLMN | Public Land-based Mobile Network (PLMN) | ||
PLPMTUD | Packetization Layer Path MTU Discovery | ||
PLSP-ID | PCEP-specific identifier for the LSP | ||
PM | Pervasive Monitoring (PM) | ||
Performance Monitoring (PM) | |||
pMAG | previous Mobility Access Gateway (pMAG) | ||
PMC | Probability of Missing Commands (PMC) | ||
PMD | Physical Medium Dependent (PMD) | ||
PMF | Performance Measurement Function (PMF) | ||
PMID | Portable MAC Identity (PMID) | ||
PMIPv6 | Proxy Mobile IPv6 | ||
PMRE | Prioritized Matching Rule with Errors (PMRE) | ||
PMRN | Prioritized Matching Rule with No Errors (PMRN) | ||
PMS | Physical Media Specific (PMS) | ||
PMSI | P-Multicast Service Interface (PMSI) | ||
Provider Multicast Service Interface | |||
PMTU | Path MTU (PMTU) | ||
PMTUD | Path MTU Discovery (PMTUD) | ||
PMU | Phasor Measurement Unit (PMU) | ||
PNC | Provisioning Network Controller (PNC) | ||
PNF | Physical Network Function (PNF) | ||
pNFS | Parallel NFS (pNFS) | ||
PNG | * | Portable Network Graphics (PNG) | |
PNNI | Private Network-Network Interface (PNNI) | ||
PNS | Push Notification Service (PNS) | ||
PoE | Power over Ethernet (PoE) | ||
POF | Packet Ordering Function (POF) | ||
POI | Purge Originator Identification | ||
PON | Passive Optical Network (PON) | ||
POODLE | Padding Oracle On Downgraded Legacy Encryption (POODLE) | ||
POP | Point of Presence (POP) | ||
Post Office Protocol (POP) | |||
proof of possession (PoP) | |||
POS | PPP over SONET (POS) | ||
Packet over SONET (POS) | |||
POSH | PKIX over Secure HTTP (POSH) | ||
POSIX | * | Portable Operating System Interface (POSIX) | |
POTS | Plain Old Telephone Service | ||
PoW | proof of work (PoW) | ||
PP | Portable Part (PP) | ||
PPID | Payload Protocol Identifier (PPID) | ||
PPP | * | Point-to-Point Protocol | |
PPPoA | Point-to-Point Protocol over ATM (PPPoA) | ||
PPPoE | Point-to-Point Protocol over Ethernet (PPPoE) | ||
PPS | Packets Per Second (PPS) | ||
PPSP | Peer-to-Peer Streaming Portocol (PPSP) | ||
PPTP | Point-to-Point Tunneling Protocol (PPTP) | ||
PR | Persistent Reservation (PR) | ||
PRID | Push Resource ID (PRID) | ||
PR-SCTP | Partially Reliable Stream Control Transmission Protocol (PR-SCTP) | ||
PRA | Purported Responsible Address (PRA) | ||
PRACK | Provisional Response Acknowledgement (PRACK) | ||
PRC | Provisioning Class (PRC) | ||
Partial Route Computation (PRC) | |||
PRE | Packet Replication and Elimination (PRE) | ||
PRECIS | Preparation, Enforcement, and Comparison of Internationalized Strings (PRECIS) | ||
PREOF | Packet Replication, Elimination and Ordering Functions (PREOF) | ||
PRF | Pseudorandom Function (PRF) | ||
Packet Replication Function (PRF) | |||
PRL | Potential Router List (PRL) | ||
Parameter Request List (PRL) | |||
PRNG | Pseudorandom Number Generator (PRNG) | ||
ProAV | professional audio and video industry (ProAV) | ||
PRP | Parallel Redundancy Protocol (PRP) | ||
pseudorandom permutation (PRP) | |||
PRR | Port-Range Router (PRR) | ||
Policy Reserve Rule (PRR) | |||
PRTC | Primary Reference Time Clock (PRTC) | ||
PS | Parametric Stereo (PS) | ||
Proxy Signature | |||
PSAMP | Packet Sampling (PSAMP) | ||
PSAP | Public Safety Answering Point (PSAP) | ||
PSC | Packet Switch Capable (PSC) | ||
Packet Switching Capable (PSC) | |||
PHB Scheduling Class (PSC) | |||
Protection State Coordination (PSC) | |||
PSD | Power Spectral Density (PSD) | ||
PSFB | payload-specific feedback message (PSFB) | ||
PSH | Do not expand | TCP flag bit name | |
PSID | Port Set Identifier (PSID) | ||
PSK | Pre-Shared Key (PSK) | ||
PSKC | Portable Symmetric Key Container (PSKC) | ||
PSL | Public Suffix List (PSL) | ||
PSN | * | Public Switched Network | |
Packet Switched Network | |||
PSNP | Partial Sequence Number PDU (PSNP) | ||
Partial Sequence Numbers PDU (PSNP) | |||
Packet Sequence Number (PSN) | |||
PSS | Packet-switched Streaming Service (PSS) (3GPP) | ||
Probabilistic Signature Scheme (PSS) | As in RSASSA-PSS | ||
PSTN | Public Switched Telephone Network (PSTN) | ||
PT | payload type (PT) | ||
posture transport | |||
Protection Type (PT) | |||
PTA | PMSI Tunnel Attribute (PTA) | ||
PTB | Packet Too Big (PTB) | ||
PTI | Payload Type Identifier (PTI) | ||
Public Technical Identifier (PTI) | |||
PTK | Pairwise Transient Key (PTK) | ||
PTM | Packet Transfer Mode (PTM) | ||
Pulse-Time Modulation (PTM) | |||
PTO | Probe Timeout (PTO) | ||
PTP | Precision Time Protocol (PTP) | ||
PTS | presentation time stamp (PTS) | ||
PTSW | payload type switch (PTSW) | ||
PtM | Point to Multipoint (PtM) | ||
PtP | Point to Point (PtP) | ||
PUC | Probability of Unwanted Commands (PUC) | ||
PURR | Proxy Unique Registration Reference (PURR) | ||
PV | Posture Validator (PV) | ||
PVC | Permanent Virtual Circuit (PVC) | ||
PvD | Provisioning Domain (PvD) | ||
PVP | Permanent Virtual Path (PVP) | ||
PVT | Public Validation Token (PVT) | ||
PW | pseudowire | ||
PW-RED | Pseudowire Redundancy (PW-RED) | ||
PWE3 | Pseudowire Emulation Edge-to-Edge (PWE3) | ||
QEP | query execution plan (QEP) | ||
QNAME | * | query | |
QoE | Quality of Experience (QoE) | ||
QoP | Quality of Protection (QoP) | ||
QoS | * | Quality of Service (QoS) | |
QQIC | Querier's Query Interval Code (QQIC) | ||
QR | Quick Response (QR) | ||
QRV | Querier's Robustness Variable (QRV) | ||
QUIC | * | Not an acronym per the WG | |
QSIG | * | No expansion (was: Q-signaling protocol) | |
R2T | request-to-transmit (R2T) | ||
Ready to Transfer (R2T) | |||
R2TSN | Ready to Transfer Sequence Number (R2TSN) | ||
RA | Router Advertisement (RA) | ||
Router Alert (RA) | |||
Routing Area (RA) | |||
registration authority (RA) | |||
RAA | Re-Auth-Answer (RAA) | ||
RACK | Recent Acknowledgment | ||
RADIUS | * | Remote Authentication Dial-In User Service (RADIUS) | |
RAID | Redundant Array of Independent Disks (RAID) | ||
RAL | RPL-Aware Leaf (RAL) | ||
RAM | * | Random-Access Memory | |
RAMS | Rapid Acquisition of Multicast Sessions (RAMS) | ||
RAMS-R | RAMS Request (RAMS-R) | ||
RAMS-T | RAMS Termination (RAMS-T) | ||
RAN | Radio Access Network (RAN) | ||
Regional Access Network (RAN) | |||
RPL-Aware Node (RAN) | |||
RANAP | Radio Access Network Application Protocol (RANAP) | ||
RANGER | Routing and Addressing in Networks with Global Enterprise Recursion (RANGER) | ||
RAO | Router Alert Option (RAO) | ||
RAP | Random Access Point (RAP) | ||
RAQMON | Real-time Application Quality-of-Service Monitoring (RAQMON) | ||
RAR | Re-Auth-Request (RAR) | ||
RATS | Remote ATtestation procedureS (RATS) | ||
RBAC | Resource-Based Admission Control (RBAC) | ||
RBNF | Routing Backus-Naur Form (RBNF) | ||
RBR | Realm Border Router (RBR) | ||
Regional Border Router (RBR) | |||
RBridge | Routing Bridge (RBridge) | ||
* | RBridge Channel | Not an abbreviation; is a name of a facility, per guidance. | |
RC | Routing Controller (RC) | ||
RC4 | * | Rivest Cipher #4 | Not common, but no expansion required |
RCODE | * | No expansion | |
RCS | Rich Communication Services (RCS) | ||
RD | Route Distinguisher (RD) | ||
Router Discovery (RD) | |||
Recursion Desired (RD) | |||
Resource Directory (RD) | |||
RDAP | Registration Data Access Protocol (RDAP) | ||
RDDP | Remote Direct Data Placement Protocol (RDDP) | ||
RDE | Registry Data Escrow (RDE) | ||
RDF | Resource Description Framework (RDF) | ||
RDI | Remote Defect Indicator (RDI) | ||
Remote Defect Indication (RDI) | |||
Reverse Defect Indication (RDI) | |||
RDM | Replay Detection Method (RDM) | ||
RDMA | Remote Direct Memory Access (RDMA) | ||
RDN | Relative Distinguished Name (RDN) | ||
Registered Domain Name (RDN) | |||
rDNS | reverse DNS (rDNS) | ||
RDNSS | Recursive DNS Server (RDNSS) | ||
RDO | Route Discovery Option (RDO) | ||
RDoT | Recursive DoT (RDoT) | ||
RDP | * | Reliable Data Protocol (RDP) | |
RDS | Resolution Discovery System (RDS) | ||
RE | Redundancy Elimination (RE) | ||
REAP | Reachability Protocol (REAP) | ||
RED | Random Early Detection (RED) | ||
REE | Rich Execution Environment (REE) | ||
RELAX NG | * | Regular Language for XML Next Generation | Do not expand; better known by RELAX NG |
RELOAD | REsource LOcation And Discovery (RELOAD) | ||
REMB | Receiver Estimated Maximum Bitrate (REMB) | ||
REST | Representational State Transfer (REST) | ||
RESTCONF | * | No expansion | |
RESTful | Ideally includes a sentence to define RESTful, e.g., RESTful refers to the Representational State Transfer (REST) architecture. | ||
RF | radio frequency (RF) | ||
RFB | Remote Framebuffer (RFB) | ||
RFC | * | Request for Comments | |
RFD | Reduced Function Device (RFD) | ||
Route Flap Damping (RFD) | |||
RFID | Radio Frequency Identification (RFID) | ||
RFPI | Radio Fixed Part Identity (RFPI) | ||
RGB | * | red, green, blue | |
RGP | Redemption Grace Period | ||
RGRP | Reporting Group (RGRP) | ||
RGRS | Reporting Group Reporting Sources (RGRS) | ||
RGW | routing gateway (RGW) | ||
RH3 | type 3 Routing Header for IPv6 (RH3) | ||
RHO | Redirected Header Option (RHO) | ||
RHT | Routing Header Type (RHT) | ||
RI | Router Information (RI) | ||
CDNI Request Routing Redirection interface (RI) | |||
RIB | * | Routing Information Base (RIB) | |
RID | Real-time Inter-network Defense (RID) | ||
restriction identifier (RID) | |||
RIG | Referral Internet Groper (RIG) | ||
RIID | Rendezvous Point Interface ID | ||
RIP | * | Routing Information Protocol | |
RIPE NCC | * | Reseaux IP Europeens Network Coordination Centre | |
RIPng | Routing Information Protocol Next Generation (RIPng) | ||
RIR | Regional Internet Registry (RIR) | ||
RISC | Reduced Instruction Set Computer (or Computing) | ||
RJRS | Recovery Journal Receiver Structure (RJRS) | ||
RJSS | Recovery Journal Sending Structure (RJSS) | ||
RKAP | Reconfiguration Key Authentication Protocol (RKAP) | ||
RLDRAM | Reduced Latency Dynamic Random-Access Memory (RLDRAM) | ||
RLE | * | Run Length Encoding | |
RLMI | Resource List Meta-Information (RLMI) | ||
RLOC | Routing Locator (RLOC) | ||
RLQR | Relative Link Quality (Receive) (RLQR) | ||
RLQT | Relative Link Quality (Transmit) (RLQT) | ||
RLS | Resource List Server (RLS) | ||
RMCAT | RTP Media Congestion Avoidance Techniques (RMCAT) | ||
RMON | remote (network) monitoring (RMON) | ||
RMS | root mean square (RMS) | ||
RMSS | Receiver Maximum Segment Size (RMSS) | ||
RMT | Reliable Multicast Transport (RMT) | ||
RNC | Radio Network Controller (RNC) | ||
Relax NG Compact Notation | |||
RNIC | RDMA-enabled Network Interface Controller (RNIC) | ||
RDMA Network Interface Card (RNIC) | |||
RNVE | Regular NVE (RNVE) | ||
ROA | Route Origin Authorization (ROA) | ||
ROADM | Reconfigurable Optical Add/Drop Multiplexer (ROADM) | ||
ROC | Rollover Counter (ROC) | ||
RoCE | RDMA over Converged Ethernet (RoCE) | Per guidance, pronounced “Rocky”. | |
RoE | Radio over Ethernet (RoE) | ||
ROHC | RObust Header Compression (ROHC) | ||
ROLIE | Resource-Oriented Lightweight Information Exchange (ROLIE) | ||
ROLL | Routing Over Low-Power and Lossy Network (ROLL) | ||
ROM | * | Read-Only Memory | |
ROV | Route Origin Validation | ||
ROVR | Registration Ownership Verifier (ROVR) | ||
RP | Rendezvous Point (RP) | ||
Relying Party (RP) | |||
Reply Path (RP) | |||
Routing Processor (RP) | |||
Request Parameters (RP) | |||
Reverse Path (RP) | |||
RPA | Rendezvous Point Address (RPA) | ||
RPC | * | remote procedure call (RPC) | Remote Procedure Call protocol |
RFC Production Center (RPC) | |||
RPCSEC_GSS | * | RPC security protocol RPC-over-RDMA Version 1 | |
Remote Direct Memory Access Transport for Remote Procedure Call Version 1 | No need to expand if RFC 8166 is referenced | ||
RPF | Reverse Path Forwarding (RPF) | ||
RPI | RPL Packet Information (RPI) | ||
RPKI | Resource Public Key Infrastructure (RPKI) | ||
RPL | Routing Protocol for Low-Power and Lossy Networks (RPL) | ||
Rendezvous Point Link (RPL) | |||
RPN | Registered Parameter Numbers (RPN) | “RPNs” is used in RFC 4695 | |
RPR | relay peer routing (RPR) | ||
RPT | Rendezvous Point Tree (RPT) | ||
RPSI | Reference Picture Selection Indication (RPSI) | ||
RPSL | Routing Policy Specification Language (RPSL) | ||
RR | Resource Record (RR) | ||
receiver report (RR) | |||
Route Reflector (RR) | As used by BGP | ||
RRH | Remote Radio Head (RRH) | ||
RRL | Response Rate Limiting (RRL) | ||
RRO | Record Route Object (RRO) | ||
RRT | Return Routability Test (RRT) | ||
RS | Retransmission Server (RS) | ||
Router Solicitation (RS) | |||
Resource Server (RS) | |||
Recording Session (RS) | |||
RSA | * | Rivest, Shamir and Adleman | |
Routing and Spectrum Assignment (RSA) | |||
RSAES-OAEP | RSA Encryption Scheme - Optimal Asymmetric Encryption Padding (RSAES-OAEP) | ||
RSASSA-PSS | RSA Probabilistic Signature Scheme (RSASSA-PSS) | ||
RSC | Receive Segment Coalescing (RSC) | ||
RPKI Signed Checklist (RSC) | |||
RSE | RFC Series Editor (RSE) | ||
RSG | Radio Network Controller Site Gateway (RSG) | ||
RSI | Receiver Summary Information (RSI) | ||
RSIP | Realm Specific IP (RSIP) | ||
RSN | Reservation Sequence Number (RSN) | ||
RSOO | Relay-Supplied Options option (RSOO) | ||
RSP | Rendered Service Path (RSP) | ||
RSS | * | Rich Site Summary (RSS) | |
Read Sequence Status Block (RSS) | |||
Received Signal Strength (RSS) | |||
Resident Set Size (RSS) | |||
RSSAC | Root Server System Advisory Committee (RSSAC) | ||
RSSI | Received Signal Strength Indication (RSSI) | ||
RST | Do not expand | TCP flag bit name | |
RSTP | Rapid Spanning Tree Protocol (RSTP) | IEEE 802.1t | |
RSVP | * | Resource Reservation Protocol | |
RSVP-TE | * | RSVP - Traffic Engineering | |
RT | Route Target (RT) | ||
RTBH | Remote Triggered Black Hole (RTBH) | ||
RTCP | * | RTP Control Protocol (RTCP) | |
* | Real-time Transport Control Protocol (RTCP) | Use this if RTP in RTCP needs to be expanded | |
RTCWEB | * | Web Real-Time Communication | |
RTMFP | Real-Time Media Flow Protocol (RTMFP) | ||
RTMP | Real Time Messaging Protocol (RTMP) | ||
RTO | retransmission timeout (RTO) | ||
RTP | * | Real-time Transport Protocol | |
RTS | request to send (RTS) | ||
RTSP | Real-Time Streaming Protocol (RTSP) | ||
RTT | * | round-trip time | |
RTX | * | Retransmission | |
RUL | RPL-Unaware Leaf (RUL) | ||
RVS | Rendezvous Server (RVS) | ||
RW | Restart Window (RW) | ||
RWA | Routing and Wavelength Assignment (RWA) | ||
rwnd | receiver window (rwnd) | ||
RWS | required whitespace (RWS) | ||
RZ | Return-to-Zero (RZ) | ||
S-BFD | Seamless Bidirectional Forwarding Detection (S-BFD) | ||
S-BGP | Secure Border Gateway Protocol (S-BGP) | ||
S-GW | Serving Gateway (S-GW) | ||
S-NAPTR | Straightforward-Naming Authority Pointer (S-NAPTR) | ||
S-NH-EC | Segmented Next-Hop Extended Community (S-NH-EC) | ||
S-PE | Switching Provider Edge (S-PE) | ||
S-PLC | supervisory PLC (S-PLC) | ||
S-PMSI | Selective PMSI (S-PMSI) | ||
S-VLAN | Service VLAN (S-VLAN) | ||
S2L | source-to-leaf (S2L) | ||
S46 | Softwire46 (S46) | ||
SaaS | Software as a Service (SaaS) | ||
Storage as a Service (SaaS) | |||
SA | security association (SA) | ||
Source-Active (SA) | |||
Source Address (SA) | |||
Situational Awareness (SA) | |||
SABM | Standard Application Identifier Bit Mask (SABM) | ||
SAC | Source Address Compression (SAC) | ||
State Advertisement Control (SAC) | |||
SACK | selective acknowledgment (SACK) | ||
SACM | Security Automation and Continuous Monitoring (SACM) | ||
SACRED | Securely Available Credentials (SACRED) | ||
SAD | Security Association Database (SAD) | ||
SADR | Source Address Dependent Routing (SADR) | ||
SAFI | * | Subsequent Address Family Identifier (SAFI) | |
SAI | Service Activation Interface (SAI) | ||
SAID | Security Association ID | Historically (in early drafts) “SAId” was used in MIB object names and also in enumeration values like “Said”; can leave them as is mainly because: a) NMS vendors and operators are familiar with that syntax for OBJECT names involving SAIDs b) It is risky to make global replace that could lead to SNMP syntax errors on deployment (e.g., global replace of SAId for SAID) OK to change in DESCRIPTION Clauses ONLY: “(SAID)” instead of “(SAId)“ “SAID” instead of “SAId” |
|
SALT | Speech Application Language Tags (SALT) | ||
SAM | Scalable Adaptive Multicast (SAM) | ||
Source Address Mode (SAM) | |||
SAM2 | SCSI Architecture Model - 2 (SAM2) | ||
SAML | Security Assertion Markup Language (SAML) | ||
SAN | System Area Network (SAN) | ||
Subject Alternative Name (SAN) | |||
SANA | Space Assigned Numbers Authority (SANA) | ||
SAOL | Structured Audio Orchestra Language (SAOL) | ||
SAP | Session Announcement Protocol (SAP) | ||
Service Access Point (SAP) | |||
Serving Access Point (SAP) | |||
Service Attachment Point (SAP) | |||
SAR | Segmentation and Reassembly (SAR) | ||
SAS | Serial Attached SCSI (SAS) | ||
Sequential Aggregate Signature (SAS) | |||
Short Authentication String (SAS) | |||
SASL | Simple Authentication and Security Layer (SASL) | ||
SAToP | Structure-Agnostic Time Division Multiplexing over Packet (SAToP) | ||
SAVI | Source Address Validation Improvement (SAVI) | ||
SAVP | * | Secure Audio-Visual Profile (SAVP) | |
SAVPF | * | Secure Audio-Visual Profile with Feedback (SAVPF) | |
SB | Source Block (SB) | ||
SBC | Session Border Controller (SBC) | ||
SBD | Shared Bottleneck Detection (SBD) | ||
Supplementary Broadcast Domain (SBD) | |||
SBE | Signaling Path Border Element (SBE) | ||
SBG | Session Border Gateway (SBG) | ||
SBM | Subnet Bandwidth Manager (SBM) | ||
SBN | Source Block Number (SBN) | ||
SBR | Spectral Band Replication (SBR) | ||
SC | Softwire Concentrator (SC) | ||
Switched Connection (SC) | |||
Simplified Chinese (SC) | |||
SCADA | Supervisory Control and Data Acquisition (SCADA) | ||
SCCRP | Start-Control-Connection-Reply (SCCRP) | ||
SCCRQ | Start-Control-Connection-Request (SCCRQ) | ||
SCHAC | Schema for Academia (SCHAC) | ||
SCHC | Static Context Header Compression (SCHC) | ||
SCI | Structured Cybersecurity Information (SCI) | ||
SCIM | System for Cross-domain Identity Management (SCIM) | ||
SCRAM | Salted Challenge Response Authentication Mechanism (SCRAM) | ||
SCReAM | Self-Clocked Rate Adaptation for Multimedia (SCReAM) | ||
SCS | Secure Cookie Sessions (SCS) | ||
SCSI | Small Computer System Interface (SCSI) | ||
Switching Capability Specific Information (SCSI) | |||
SCT | Sender Current Time (SCT) | ||
Signed Certificate Timestamp (SCT) | |||
SCTP | Stream Control Transmission Protocol (SCTP) | ||
SCVP | Simple Certificate Validation Protocol (SCVP) | ||
Server-Based Certificate Validation Protocol (SCVP) | |||
S/D | Source/Destination (S/D) | ||
SD | Standard Definition (SD) | ||
sub-domain (SD) | |||
Signal Degrade (SD) | |||
SD-WAN | Software-Defined Wide-Area Network (SD-WAN) | ||
SDAT | Simple DNA address table (SDAT) | ||
SDES | source description (SDES) | ||
SDH | Synchronous Digital Hierarchy (SDH) | ||
SDID | Signing Domain Identifier (SDID) | ||
SDK | * | software development kit | |
SDN | Software-Defined Networking (SDN) | ||
Software-Defined Network (SDN) | |||
SDNV | Self-Delimiting Numeric Value (SDNV) | ||
SDO | Standards Development Organization (SDO) | ||
SDP | Session Description Protocol (SDP) | ||
Service Demarcation Point (SDP) | |||
SDSI | Simple Distributed Security Infrastructure (SDSI) | ||
SDU | service data unit (SDU) | ||
SEAL | Subnetwork Encapsulation and Adaptation Layer (SEAL) | ||
SECG | Standards for Efficient Cryptography Group (SECG) | ||
SEI | Supplemental Enhancement Information (SEI) | ||
SEND | Secure Neighbor Discovery (SEND) | ||
SEP | Secure Entry Point (SEP) | ||
SERO | Secondary Explicit Route Object (SERO) | ||
SES | Severely Errored Seconds (SES) | ||
SESPAKE | Security Evaluated Standardized Password Authenticated Key Exchange (SESPAKE) | ||
SF | Scheduling Function (SF) | ||
Service Function (SF) | |||
Signal Fail (SF) | |||
SFC | Service Function Chaining (SFC) | ||
Service Function Chain (SFC) | |||
SFF | Service Function Forwarder (SFF) | ||
SFGMP | Source Filtering Group Management Protocol (SFGMP) | ||
SFL | Synonymous Flow Label (SFL) | ||
SFMT | sub-feedback message type (SFMT) | ||
SFP | Service Function Path (SFP) | ||
SFTP | Secure FTP (SFTP) | ||
SFU | Selective Forwarding Units (SFU) | ||
SGML | Standard Generalized Markup Language (SGML) | ||
SGSN | Serving GPRS Support Node (SGSN) | ||
SGW | Serving Gateway (SGW) | ||
SHA | * | Secure Hash Algorithm | |
SHDSL | Single-pair High-speed Digital Subscriber Line (SHDSL) | ||
SHIM | Stanza Headers and Internet Metadata (SHIM) | ||
Shim6 | * | Site Multihoming by IPv6 Intermediation (Shim6) | |
* | Level 3 Multihoming Shim Protocol for IPv6 (Shim6) | ||
Level 3 Multihoming Shim Protocol for IPv6 (Shim6) | |||
SI | softwire initiator (SI) | ||
Set Identifier (SI) | |||
Service Index (SI) | |||
SIA | Subject Information Access (SIA) | ||
SubjectInfoAccess (SIA) | the field | ||
SID | Schema Item iDentifier (SID) | ||
segment identifier (SID) | From RFC 8402: SID: a segment identifier. Note that the term SID is commonly used in place of the term “Segment”, though this is technically imprecise as it overlooks any necessary translation. | ||
session ID (SID) | |||
server ID (SID) | |||
sender ID (SID) | |||
Silence Descriptor (SID) | Per guidance, “Silence Descriptor” or “Silence Insertion Description”. The 3GPP and ETSI definition seems to be the former. | ||
Silence Insertion Descriptor (SID) | |||
SIDR | Secure Inter-Domain Routing (SIDR) | ||
SIFS | Short Interframe Space (SIFS) | ||
SIIT | Stateless IP/ICMP Translation Algorithm (SIIT) | ||
SILK | Not an acronym. See usage in RFC 6716 | ||
SIM | Subscriber Identity Module (SIM) | ||
SIMCO | Simple Middlebox Configuration (SIMCO) | ||
SIMD | single instruction, multiple data (SIMD) | ||
SIMPLE | SIP for Instant Messaging and Presence Leveraging Extensions (SIMPLE) | ||
SIP | * | Session Initiation Protocol | |
Simple Internet Protocol (SIP) | |||
SIPBRANDY | SIP Best-practice Recommendations Against Network Dangers to privacY (SIPBRANDY) | ||
SIPP | Simple Internet Protocol plus (SIPP) | ||
SIPREC | SIP-Based Media Recording (SIPREC) | ||
SIPS | Session Initiation Protocol Secure (SIPS) | ||
SIPTO | Selected IP Traffic Offload (SIPTO) | ||
SIR | Source Intermediary Recipient (SIR) | ||
Signal-to-Interference Ratio (SIR) | |||
SIV | Synthetic Initialization Vector (SIV) | ||
SK | secret key (SK) | ||
SKFC | Session Key Far Component (SKFC) | ||
SKI | Subject Key Identifier (SKI) | ||
SKNC | Session Key Near Component (SKNC) | ||
SLA | Service Level Agreement (SLA) | ||
SLAAC | Stateless Address Autoconfiguration (SLAAC) | ||
SLD | Second-Level Domain (SLD) | ||
SLI | Set-Link-Info (SLI) | ||
Slice Lost Indication (SLI) | |||
SLLA | Source Link-Layer Address (SLLA) | ||
SLLAO | Source Link-Layer Address Option (SLLAO) | ||
SLO | Service Level Objective (SLO) | ||
SLP | Service Location Protocol (SLP) | ||
SLURM | Simplified Local Internet Number Resource Management with the RPKI (SLURM) | ||
SM | Single Marking (SM) | ||
ShangMi (SM) | |||
SMB | Session Management Broker (SMB) | ||
Server Message Block (SMB) | |||
SMDS | Switched Multimegabit Data Service (SMDS) | ||
SMET | Selective Multicast Ethernet Tag (SMET) | ||
SMF | Standard MIDI File (SMF) | ||
S/MIME | * | Secure/Multipurpose Internet Mail Extensions | |
SMI | Structure of Management Information (SMI) | ||
SMIL | Synchronized Multimedia Integration Language (SMIL) | ||
SMIv2 | Structure of Management Information Version 2 (SMIv2) | ||
SMP | Shared Mesh Protection (SMP) | ||
SMPTE | Society of Motion Picture and Television Engineers (SMPTE) | ||
SMR | Solicit-Map-Request (SMR) | ||
Shared Mesh Restoration (SMR) | |||
SMS | * | Short Message Service | |
SMSS | Sender Maximum Segment Size (SMSS) | ||
SMTP | * | Simple Mail Transfer Protocol | |
SMUX | SNMP Multiplex (SMUX) | ||
SN | Sequence Number (SN) | ||
SNA | Systems Network Architecture (SNA) | ||
SNACK | Selective Negative Acknowledgment (SNACK) | ||
Sequence Number Acknowledgement (SNACK) | |||
SNAP | Subnetwork Access Protocol (SNAP) | ||
Simple Notification and Alarm Protocol (SNAP) | |||
SNI | Server Name Indication (SNI) | ||
SNIA | Storage Networking Industry Association (SNIA) | ||
SNID | subnamespace identifier (SNID) | ||
SNMP | * | Simple Network Management Protocol | |
SNP | Subnetwork Point (SNP) | ||
Sequence Number Packet (SNP) | |||
Sequence Number PDU (SNP) | |||
SNPA | Subnetwork Point of Attachment (SNPA) | ||
SNR | Signal-to-Noise Ratio (SNR) | ||
Serial Number (SNR) | |||
SNS | Social Networking Service (SNS) | ||
SNTP | Simple Network Time Protocol (SNTP) | ||
SOA | * | Start of Authority | Resource Record |
Source of Authority (SOA) | |||
SOAP | * | Simple Object Access Protocol | But “a Web services messaging protocol; originally the acronym for Simple Object Access Protocol, the term is no longer defined in common use” -IEEE Computer Society “In previous versions of this specification the SOAP name was an acronym. This is no longer the case.” - W3C |
SoC | System on Chip (SoC) | ||
SOCKS | * | No expansion | Name of protocol |
SODP | Secure Object Delivery Protocol (SODP) | ||
SOHO | Small Office, Home Office (SOHO) | ||
SOI | SESSION-OF-INTEREST (SOI) | ||
SOL | Serial over LAN (SOL) | ||
SONET | Synchronous Optical Network (SONET) | ||
SOP | Start of Packet (SOP) | ||
Same-Origin Policy (SOP) | |||
SP | Service Provider (SP) | ||
SPB | Shortest Path Bridging (SPB) | ||
SPBM | |||
SPC | Service Provider Code (SPC) | ||
Soft Permanent Connection (SPC) | |||
SPD | Security Policy Database (SPD) | ||
SPE | Synchronous Payload Envelope (SPE) | ||
SPEKE | Simple Password Exponential Key Exchange (SPEKE) | ||
SPF | Sender Policy Framework (SPF) | ||
Shortest Path First (SPF) | 9/8/08 - SPF should be expanded in most if not all IS-IS documents as “Shortest Path First” rather than “Sender Policy Framework” | ||
SPHINCS | * | No expansion | |
SPI | Security Parameter Index (SPI) | ||
Service Path Identifier (SPI) | |||
SPICE | Secure Protocol for Internet Content Exchange (SPICE) | ||
SPID | Service Provider ID (SPID) | ||
SPIT | Spam over Internet Telephony (SPIT) | ||
SPKI | Simple Public Key Infrastructure (SPKI) | ||
SubjectPublicKeyInfo (SPKI) | |||
Subject Public Key Info (SPKI) | |||
SPKM | Simple Public-Key GSS-API Mechanism (SPKM) | ||
SPL | Special-Purpose Label (SPL) | ||
SPM | Secure Password Method (SPM) | ||
SPME | Sub-Path Maintenance Element (SPME) | ||
SPND | Secure Proxy Neighbor Discovery (SPND) | ||
SPNEGO | Simple and Protected GSS-API Negotiation | ||
SPT | shortest path tree (SPT) | ||
SPVC | Switched Permanent Virtual Circuit (SPVC) | ||
SQL | * | Structured Query Language | |
SR | sender report (SR) | ||
Segment Routing (SR) | |||
SR OS | Service Router Operating System (SR OS) | ||
SR-VCC | Single Radio Voice Call Continuity (SR-VCC) | ||
SRC | Session Recording Client (SRC) | ||
SRG | Shared Risk Group (SRG) | ||
SRGB | Segment Routing Global Block (SRGB) | ||
SRGS | Speech Recognition Grammar Specification (SRGS) | ||
SRH | Source Routing Header (SRH) | ||
SRLG | Shared Risk Link Group (SRLG) | ||
SRP | Secure Routing Protocol (SRP) | ||
Secure Remote Password (SRP) | |||
Stateful PCE Request Parameter (SRP) | |||
SRR | status report request (SRR) | ||
symmetric recursive routing (SRR) | |||
SRRO | Secondary Record Route Object (SRRO) | ||
SRS | Session Recording Server (SRS) | ||
SRTCP | Secure Real-time Transport Control Protocol (SRTCP) | ||
SRTE | Segment Routing Traffic Engineering (SRTE) | ||
SRTP | Secure Real-time Transport Protocol (SRTP) | “Realtime” also okay | |
SRTT | Smoothed Round-Trip Time (SRTT) | ||
SRV | * | Service Record (SRV) | Resource Record |
SS7 | Signaling System 7 (SS7) | ||
SS-FSSI | Sender-Side FEC-Scheme-Specific Information (SS-FSSI) | ||
SS-PW | Single-Segment Pseudowire (SS-PW) | ||
SSAP | Source Service Access Point (SSAP) | ||
SSDP | Simple Service Discovery Protocol (SSDP) | ||
SSE | Server Session End (SSE) | ||
State Signaling Event (SSE) | |||
Server-Sent Event (SSE) | |||
SSH | Secure Shell (SSH) | May need to add “protocol”; e.g., Secure Shell (SSH) protocol | |
SSID | Service Set Identifier (SSID) | ||
Session ID (SSID) | |||
STAMP Session Identifier (SSID) | |||
SSK | Secret Signing Key (SSK) | ||
SSL | * | Secure Sockets Layer (SSL) | |
SSL/TLS | * | Secure Sockets Layer/Transport Layer Security (SSL/TLS) | |
SSM | * | source-specific multicast (SSM) | |
Single-Source Multicast (SSM) | |||
SSN | Server Sequence Number (SSN) | ||
subsystem number (SSN) | |||
Stream Sequence Number (SSN) | |||
Station Serial Number (SSN) | |||
SSO | Single Sign-On (SSO) | ||
SSON | Spectrum-Switched Optical Network (SSON) | ||
SSP | scheme-specific part (SSP) | ||
SIP Service Provider (SSP) | |||
SSPI | Security Support Provider Interface (SSPI) | ||
SSRC | synchronization source (SSRC) | ||
SSRF | Server-Side Request Forgery (SSRF) | ||
SSRR | Strict Source and Record Route (SSRR) | ||
ssthresh | slow start threshold (ssthresh) | ||
SSU | Synchronization Supply Unit (SSU) | ||
SSV | Shared Secret Value (SSV) | ||
Secret State Verifier (SSV) | |||
ST-PE | Source Terminating Provider Edge (ST-PE) | ||
STag | Steering Tag (STag) | ||
STAMP | Simple Two-way Active Measurement Protocol (STAMP) | ||
STAR | Short-Term, Automatically Renewed (STAR) | ||
STB | Set-Top Box (STB) | ||
STIR | Secure Telephone Identity Revisited (STIR) | ||
STOL | Short Take-Off and Landing (STOL) | ||
STP | Spanning Tree Protocol (STP) | ||
Secure Transfer Protocol (STP) | |||
STS | Synchronous Transport Signal (STS) | ||
Security Token Service (STS) | |||
STUN | Session Traversal Utilities for NAT (STUN) | ||
Simple Traversal of the UDP Protocol through NAT (STUN) | |||
SUDN | Special-Use Domain Name (SUDN) | ||
SUT | System Under Test (SUT) | ||
SVC | Switched Virtual Circuit (SVC) | ||
SVCB | Service Binding (SVCB) | ||
SVEC | Synchronization Vector (SVEC) | ||
SVG | * | Scalable Vector Graphics (SVG) | |
SVL | Shared VLAN Learning (SVL) | ||
SVN | Software Version Number (SVN) | ||
SVT | Signature Validation Token (SVT) | ||
SW | Session Wide (SW) | ||
SWID | Software Identification (SWID) | ||
SWIMA | Software Inventory Message and Attributes (SWIMA) | ||
SWS | silly window syndrome (SWS) | ||
SYN | * | No expansion | TCP flag bit name. See FIN. |
syncE | synchronous Ethernet (syncE) | ||
T-MPLS | Transport MPLS (T-MPLS) | ||
T-PE | Terminating Provider Edge (T-PE) | ||
TA | Trust Anchor (TA) | ||
Trusted Application Manager (TAM) | |||
TAC | Type Allocation Code (TAC) | ||
TAE | Timing Alignment Error (TAE) | ||
TAL | Trust Anchor Locator (TAL) | ||
TAMP | Trust Anchor Management Protocol (TAMP) | ||
TAPI | Telephony Application Programming Interface (TAPI) | ||
Transport API (TAPI) | |||
TC | Textual Convention (TC) | ||
Topology Control (TC) | message type in RFC 3626 | ||
Traffic Class (TC) | |||
Transmission Convergence (TC) | |||
Transparent Clock (TC) | |||
Traditional Chinese (TC) | |||
Truncated (TC) | |||
TCA | Target Channel Adapter (TCA) | ||
TCAM | Ternary Content-Addressable Memory (TCAM) | ||
TCB | Transmission Control Block (TCB) | ||
Trusted Computing Base (TCB) | |||
TCN | Topology Change Notification (TCN) | ||
TCP | * | Transmission Control Protocol | |
TCP-AO | TCP Authentication Option (TCP-AO) | ||
TCPCL | TCP(-based) convergence layer (TCPCL) | ||
TDD | Telecommunication Device for the Deaf (TDD) | ||
Time-Division Duplex (TDD) | |||
TDIM | Time-Division Inverse Multiplexing (TDIM) | ||
TDM | Time-Division Multiplexer (TDM) | ||
Time-Division Multiplexing (TDM) | |||
TDMA | * | Time-Division Multiple Access | See also CDMA |
Time Division Multiplex (TDMA) | |||
TDMoIP | Time-Division Multiplexing over IP (TDMoIP) | ||
TE | * | Traffic Engineering (TE) | |
* | Traffic Engineered (TE) | ||
TEAP | Tunnel Extensible Authentication Protocol (TEAP) | ||
TED | Traffic Engineering Database (TED) | ||
TEE | Trusted Execution Environment (TEE) | ||
TEEP | Trusted Execution Enviornment Provisioning (TEEP) | ||
TEI | Terminal Endpoint Identifier (TEI) | ||
TEID | Tunnel Endpoint Identifier (TEID) | ||
TEP | tunnel endpoint (TEP) | ||
TERENA | Trans-European Research and Education Networking Association (TERENA) | ||
TESLA | Timed Efficient Stream Loss-Tolerant Authentication (TESLA) | ||
TF | transport format (TF) | ||
TF-EMC2 | Task Force on European Middleware Coordination and Collaboration (TF-EMC2) | ||
TFC | Traffic Flow Confidentiality (TFC) | ||
TFO | TCP Fast Open (TFO) | ||
TFRC | TCP Friendly Rate Control (TFRC) | ||
TFS | Time and Frequency Synchronization (TFS) | ||
TFTP | * | Trivial File Transfer Protocol | |
TGS | Ticket-Granting Server (TGS) | ||
Ticket-Granting Service (TGS) | |||
TGT | Ticket-Granting Ticket (TGT) | ||
THD | Total Harmonic Distortion (THD) | ||
TI-LFA | Topology Independent Loop-Free Alternate (TI-LFA) | ||
TIAS | Transport Independent Application Specific (Maximum) (TIAS) | ||
TIB | Tree Information Base (TIB) | ||
TIM | Traffic Indication Map (TIM) | ||
TIMIP | Terminal Independent Mobile IP (TIMIP) | ||
TIO | Transit Information Option (TIO) | ||
TKIP | Temporal Key Integrity Protocol (TKIP) | ||
TLD | Top-Level Domain (TLD) | ||
tLDP | Targeted LDP (tLDP) | Per guidance, not “T-LDP” as used in several other RFCs, e.g., RFC 6373 | |
TLLA | Target Link-Layer Address (TLLA) | ||
TLLAO | Target Link-Layer Address Option (TLLAO) | ||
TLP | Tail Loss Probe (TLP) | ||
TLS | * | Transport Layer Security (TLS) | |
Transparent LAN Services (TLS) | |||
TLSA | * | No expansion | Resource Record |
TLSP | TRILL Link State Protocol (TLSP) | ||
TLSTM | TLS Transport Model (TLSTM) | ||
TLV | * | Type-Length-Value | Self-describing data |
TMCE | Traffic-Managed Controlled Environment (TMCE) | ||
TMF | Task Management Function (TMF) | ||
TML | Transport Mapping Layer | ||
TMMBR | Temporary Maximum Media Stream Bit Rate Request (TMMBR) | ||
TMMBN | Temporary Maximum Media Stream Bit Rate Notification (TMMBN) | ||
TMTU | Tunnel MTU (TMTU) | ||
TNC | Trusted Network Connect (TNC) | ||
TNCP | TRILL Network Control Protocol (TNCP) | ||
TNP | TRILL Network Protocol (TNP) | ||
TO | Tagged Offset (TO) | ||
ToIP | Real-time Text over Internet Protocol (ToIP) | ||
TOE | TCP Offload Engine (TOE) | ||
target of evaluation (TOE) | |||
TOFU | trust-on-first-use (TOFU) | ||
TOI | Transmission Object Identifier (TOI) | ||
ToR | Top-of-Rack (ToR) | ||
TOS | Type of Service (TOS) | ||
TP | termination point (TP) | ||
TPA | Trust Provisioning Authority (TPA) | ||
TPGT | Target Portal Group Tag (TPGT) | ||
TPDU | Transport Protocol Data Unit (TPDU) | ||
TPM | Transport Performance Metrics (TPM) | ||
Trusted Platform Module (TPM) | |||
TPS | Transport Protocol Specific (TPS) | ||
TPUI | Temporary Portable User Identity (TPUI) | ||
TR | Tunnel Router (TR) | ||
TRILL | Transparent Interconnection of Lots of Links (TRILL) | ||
TS | Traffic Selector (TS) | ||
Transport Stream (TS) | |||
Tenant System (TS) | |||
TSA | Time Stamping Authority | ||
TSCH | Time-Slotted Channel Hopping (TSCH) | ||
TSDM | Trusted System Development Methodology (TSDM) | ||
TSecr | Timestamp Echo Reply (TSecr) | ||
TSI | Transport Session Identifier (TSI) | ||
Tenant System Interface (TSI) | |||
TSM | Transport Security Model | ||
TSN | Trunk Switched Network (TSN) | ||
Test Support Network (TSN) | |||
Transmission Sequence Number (TSN) | |||
Time-Sensitive Networking (TSN) | |||
TSO | TCP Segmentation Offload (TSO) | ||
TSTN | Temporal-Spatial Trade-off Notification (TSTN) | ||
TSTR | Temporal-Spatial Trade-off Request (TSTR) | ||
TT-PE | Target Terminating Provider Edge (TT-PE) | ||
TTD | Throughput Test Device (TTD) | ||
TTL | * | Time to Live | |
TTP | Tunnel Termination Point (TTP) | ||
TTSI | Text-To-Speech Interface (TTSI) | ||
TTT | Target Transfer Tag (TTT) | ||
TU | Time Unit (TU) | ||
transaction user (TU) | |||
TUG | Tributary Unit Group (TUG) | ||
TURN | Traversal Using Relay NAT (TURN) | ||
Traversal Using Relays around NAT (TURN) | |||
TV | Type/Value (TV) | ||
TWAMP | Two-Way Active Measurement Protocol (TWAMP) | ||
TX | * | Transmission | |
U/L | Universal/Local (U/L) | ||
UA | User Agent (UA) | ||
Unmanned Aircraft (UA) | |||
Untrusted Application (UA) | |||
UAC | User Agent Client (UAC) | ||
UAK | User Authentication Key (UAK) | ||
UAL | Unused Association Lifetime (UAL) | ||
UAM | Universal Access Method (UAM) | ||
UART | Universal Asynchronous Receiver Transmitter (UART) | ||
UAS | User Agent Server (UAS) | ||
Unavailable Seconds (UAS) | |||
Unmanned Aircraft System (UAS) | Used for both singular and plural (i.e., not “UASs”) | ||
uCDN | upstream Content Delivery Network (uCDN) | ||
UCMP | Unequal-Cost Multipath (UCMP) | ||
UCS | Uniform Client ID String (UCS) | ||
Universal Multiple-Octet Coded Character Set (UCS) | |||
Universal Coded Character Set (UCS) | |||
UDA | User Defined Application (UDA) | ||
UDABM | User-Defined Application Identifier Bit Mask (UDABM) | ||
UDDI | Universal Description, Discovery, and Integration (UDDI) | ||
UDP | * | User Datagram Protocol | |
UDP-Lite | * | User Datagram Protocol Lite | |
UDPTL | UDP Transport Layer (UDPTL) | ||
UDRP | Uniform Domain-Name Dispute-Resolution Policy (UDRP) | ||
UDVM | Universal Data/Voice Multiplexer (UDVM) | ||
UE | User Equipment (UE) | ||
UHF | * | Ultra High Frequency | |
UHP | Ultimate Hop Popping (UHP) | ||
UHR | Ultra-High Reliability (UHR) | ||
UI | * | User Interface | |
UICC | Universal Integrated Circuit Card (UICC) | ||
UID | Unique Identifier (UID) | ||
User Identifier (UID) | |||
UKS | Unknown Key Source (UKS) | ||
ULA | Unique Local Addressing (ULA) | ||
Unique Local Address (ULA) | |||
ULB | Upper Layer Binding (ULB) | ||
ULE | Ultra Low Energy (ULE) | ||
ULID | Upper-Layer Identifier (ULID) | ||
ULL | Ultra-Low Latency (ULL) | ||
ULP | Unequal Loss Protection (ULP) | ||
Upper-Level Protocol (ULP) | |||
Upper-Layer Protocol (ULP) | |||
UMA | Unlicensed Mobile Access (UMA) | ||
UMB | Ultra Mobile Broadband (UMB) | ||
UMH | Upstream Multicast Hop (UMH) | ||
UML | Unified Modeling Language (UML) | ||
UMTS | Universal Mobile Telecommunications System (UMTS) | ||
U-NAPTR | URI-Enabled NAPTR (U-NAPTR) | ||
UNC | Universal Naming Convention (UNC) | ||
UNI | User-Network Interface (UNI) | ||
U-NII | Unlicensed National Information Infrastructure (U-NII) | ||
UNSAF | UNilateral Self-Address Fixing (UNSAF) | ||
U-PE | User-facing PE (U-PE) | ||
UPA | Update Notification Acknowledgement (UPA) | ||
UPF | User Plane Function (UPF) | ||
UPN | Update Notification (UPN) | ||
UPnP | Universal Plug and Play (UPnP) | ||
URG | Do not expand | TCP flag bit name | |
URI | * | Uniform Resource Identifier | |
URL | * | Uniform Resource Locator | |
URLLC | Ultra-Reliable and Low Latency Communications (URLLC) | ||
URN | * | Uniform Resource Name | |
uRPF | unicast reverse path forwarding (uRPF) | ||
USB | * | Universal Serial Bus | |
USC | University of Southern California (USC) | ||
US-CERT | US Computer Emergency Readiness Team (CERT) | ||
USM | User-based Security Model | ||
USRK | Usage Specific Root Keys (USRK) | ||
UTC | * | Coordinated Universal Time | |
UTF-8 | * | Unicode transformation format 8 | |
UTI | Universal Transport Interface (UTI) | Cisco | |
Uniform Type Identifier (UTI) | |||
UTRAN | Universal Terrestrial Radio Access Network (UTRAN) | ||
UUCP | Unix-to-Unix Copy (UUCP) | ||
UUI | User-to-User Information (UUI) | ||
UUID | Universally Unique Identifier (UUID) | ||
V2V | vehicle to vehicle (V2V) | ||
V2X | vehicle to everything (V2X) | ||
VACM | View-based Access Control Model (VACM) | ||
VAD | Voice Activity Detection (VAD) | ||
VAP | Virtual Access Point (VAP) | ||
VAPID | Voluntary Application Server Identification (VAPID) | ||
VBCM | Video Back Channel Message (VBCM) | ||
VBD | Voiceband Data (VBD) | ||
VBR | Vouch By Reference (VBR) | ||
Variable Bitrate (VBR) | |||
VBR-NRT | Variable Bit Rate - Non Real Time | ||
VBR-RT | Variable Bit Rate - Real Time | ||
VC | Virtual Circuit (VC) | ||
vCard | * | No expansion | |
VCAT | Virtual Concatenation (VCAT) | ||
VCC | Virtual Channel Connection (VCC) | ||
VCCV | Virtual Circuit Connectivity Verification (VCCV) | ||
VCI | Virtual Channel Identifier (VCI) | ||
Virtual Circuit Identifier (VCI) | |||
VDL | Valid Data Length (VDL) | ||
VDP | Virtual Station Interface (VSI) Discovery and Configuration Protocol (VDP) | ||
VDSL | Very high bit-rate Digital Subscriber Line (VDSL) | ||
Very high speed Digital Subscriber Line (VDSL) | |||
VE | VPLS Edge (VE) | ||
VET | Virtual Enterprise Traversal (VET) | ||
VHF | * | Very High Frequency | |
VI | Virtual Interface (VI) | ||
VID | VLAN ID (VID) | ||
vIP | * | virtual IP address (vIP) | |
VL | VLAN labeled (VL) | ||
VLAN | * | Virtual Local Area Network | |
VLB | Valiant Load-Balancing (VLB) | ||
VM | Virtual Machine (VM) | ||
VMR | Variable Multi Rate (VMR) | ||
VMR-WB | Variable Multi Rate WideBand (VMR-WB) | ||
VMS | Virtual Memory System (VMS) | ||
VN | Virtual Network (VN) | ||
VNC | Virtual Network Computing (VNC) | ||
VNF | Virtual Network Function (VNF) | ||
VNI | VXLAN Network Identifier | ||
Virtual Network Identifier (VNI) | |||
VNTM | Virtual Network Topology Manager (VNTM) | ||
VoCN | Voice over Cellular Network (VoCN) | ||
VoD | Video on Demand (VoD) | ||
VoIP | Voice over IP (VoIP) | ||
VoLTE | Voice over LTE (VoLTE) | ||
VO | Virtual Organization (VO) | ||
VOP | Video Object Plane (VOP) | ||
VOPRF | Verifiable Oblivious Pseudorandom Function (VOPRF) | ||
VOQ | Virtual Output Queueing (VOQ) | ||
VPC | Virtual Path Connection (VPC) | ||
VPD | Vital Product Data (VPD) | ||
VPI | Virtual Path Identifier (VPI) | ||
VPIM | Voice Profile for Internet Mail (VPIM) | ||
VPLS | Virtual Private LAN Service (VPLS) | ||
VPMS | Virtual Private Multicast Service (VPMS) | ||
VPN | * | Virtual Private Network (VPN) | |
VPN+ | Enhanced VPN (VPN+) | ||
VPWS | Virtual Private Wire Service (VPWS) | ||
VR | Virtual Reality (VR) | ||
VRF | VPN Routing and Forwarding (VRF) | ||
Virtual Routing and Forwarding (VRF) | |||
Verifiable Random Function (VRF) | |||
VRID | Virtual Router Identifier (VRID) | ||
VRP | VLAN Registration Protocol (VRP) | ||
Versatile Routing Platform (VRP) | |||
VRRP | Virtual Router Redundancy Protocol (VRRP) | ||
VSA | Vendor-Specific Attribute (VSA) | ||
VSI | Virtual Switch Instance (VSI) | ||
Virtual Station Interface (VSI) | |||
VSID | Virtual Subnet Identifier (VSID) | ||
Virtual Segment Identifier (VSID) | |||
VSP | Voice Service Provider (VSP) | ||
VSS | Virtual Subnet Selection (VSS) | ||
VT | Virtual Tributary (VT) | ||
Voltage Transformer (VT) | |||
VTEP | VXLAN Tunnel End Point (VTEP) | ||
VTOL | Vertical Take-Off and Landing (VTOL) | ||
VXLAN | Virtual eXtensible Local Area Network (VXLAN) | ||
VXML | VoiceXML (VXML) | ||
W3C | * | World Wide Web Consortium (W3C) | |
WAMS | Wide-Area Management System (WAMS) | ||
WAN | * | Wide Area Networks | |
WAP | Wireless Application Protocol (WAP) | ||
W-CDMA | Wideband Code Division Multiple Access (W-CDMA) | ||
WCE | Write Cache Enable (WCE) | ||
WDM | Wavelength Division Multiplexing (WDM) | ||
WebDAV | Web Distributed Authoring and Versioning (WebDAV) | ||
WEBRC | Wave and Equation Based Rate Control (WEBRC) | ||
WebRTC | * | Web Real-Time Communication (WebRTC) | |
WEP | Wired Equivalent Privacy (WEP) | ||
WF | Wildcard-Filter (WF) | ||
WFQ | Weighted Fair Queuing (WFQ) | ||
WG | * | Working Group | |
WGLC | Working Group Last Call | ||
WGS 84 | World Geodetic System 1984 (WGS 84) | ||
WHT | Walsh-Hadamard transform (WHT) | ||
WiLD | WiFi-based Long Distance (WiLD) | ||
WiMAX | Worldwide Interoperability for Microwave Access (WiMAX) | ||
WKP | Well-Known Prefix (WKP) | ||
Well-Known Port (WKP) | |||
WLAN | * | Wireless Local Area Network (WLAN) | |
WLE | Whole Label Evaluation (WLE) | ||
WM | Wireless Medium (WM) | ||
WMN | Wireless Mesh Network (WMN) | ||
WOTS | Winternitz One-Time Signature (WOTS) | ||
WPA2 | Wi-Fi Protected Access 2 (WPA2) | ||
WRAP | Web Resource Authorization Profiles (WRAP) | ||
WRED | Weighted Random Early Detection (WRED) | ||
WRR | Weighted Round Robin (WRR) | ||
WS | White Space (WS) | ||
WSDL | Web Services Description Language (WSDL) | ||
WSON | Wavelength Switched Optical Network (WSON) | ||
WSP | whitespace (WSP) | ||
WSR | Window Size Ratio (WSR) | ||
WSS | Wavelength Selective Switch (WSS) | ||
Secure WebSocket (WSS) | |||
Web Services Security (WSS) | |||
WTP | Wireless Termination Point (WTP) | ||
WTR | Wait to Restore (WTR) | ||
WWN | World Wide Name (WWN) | ||
WWNN | World Wide Node Name (WWNN) | ||
WWPN | World Wide Port Name (WWPN) | ||
WWW | * | World Wide Web | |
XACML | eXtensible Access Control Markup Language (XACML) | ||
XCAP | XML Configuration Access Protocol (XCAP) | ||
Xcast | Explicit Multicast (Xcast) | ||
XCON | Centralized Conferencing (XCON) | ||
XDR | External Data Representation (XDR) | ||
XEID | Extended Endpoint Identifier (XEID) | ||
XHTML | Extensible Hypertext Markup Language (XHTML) | ||
XID | Transaction ID | ||
XIP | Execute in Place (XIP) | ||
XL | Extension Label (XL) | ||
XLAT | translator (XLAT) | ||
XML | * | Extensible Markup Language | |
XML-DA | XML-Data Access (XML-DA) | ||
XML-RPC | Extensible Markup Language-Remote Procedure Calling (XML-RPC) | ||
XMLDSIG | XML Digital Signatures (XMLDSIG) | ||
XMLSIG | XML-Signature Syntax and Processing (XMLSIG) | ||
XMP | Extensible Metadata Platform (XMP) | ||
XMPP | Extensible Messaging and Presence Protocol (XMPP) | ||
XNQ | eXtended Network Quality (XNQ) | ||
XOF | extendable-output function (XOF) | ||
XOR | * | exclusive or | see EOR above |
XoT | XFR over TLS (XoT) | ||
XPath | XML Path Language (XPath) | ||
XR | Extended Report (XR) | ||
XRD | Extensible Resource Descriptor (XRD) | ||
XRI | Extensible Resource Identifier (XRI) | ||
XRO | Exclude Route Object (XRO) | ||
XSD | XML Schema Definition (XSD) | ||
XSF | XMPP Standards Foundation (XSF) | ||
XSS | cross-site scripting (XSS) | ||
XTP | Xpress Transfer Protocol (XTP) | ||
Xpress Transport Protocol (XTP) | |||
XUI | XCAP User Identifier (XUI) | ||
YADIFA | * | No expansion | |
YAML | * | Do not expand | |
YANG | * | Do not expand | |
YIN | YANG Independent Notation (YIN) | ||
ZKDF | zone key derivation function (ZKDF) | ||
ZRTP | * | Do not expand | RFC 6189 |
ZWP | Zero Window Probe (ZWP) | ||
zsh | Z SHell (zsh) | ||
ZKPP | Zero-Knowledge Password Proof (ZKPP) | ||
ZRTP | * | No expansion | |
ZSK | Zone Signing Key (ZSK) |