STD 7

RFC 9293

Transmission Control Protocol (TCP), August 2022

File formats:

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Status:
INTERNET STANDARD
Obsoletes:
RFC 793, RFC 879, RFC 2873, RFC 6093, RFC 6429, RFC 6528, RFC 6691
Updates:
RFC 1011, RFC 1122, RFC 5961
Author:
W. Eddy, Ed.
Stream:
IETF
Source:
tcpm (tsv)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC9293

Discuss this RFC: Send questions or comments to tcpm@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF  |  View History of RFC 9293


Abstract

This document specifies the Transmission Control Protocol (TCP). TCP is an important transport-layer protocol in the Internet protocol stack, and it has continuously evolved over decades of use and growth of the Internet. Over this time, a number of changes have been made to TCP as it was specified in RFC 793, though these have only been documented in a piecemeal fashion. This document collects and brings those changes together with the protocol specification from RFC 793. This document obsoletes RFC 793, as well as RFCs 879, 2873, 6093, 6429, 6528, and 6691 that updated parts of RFC 793. It updates RFCs 1011 and 1122, and it should be considered as a replacement for the portions of those documents dealing with TCP requirements. It also updates RFC 5961 by adding a small clarification in reset handling while in the SYN-RECEIVED state. The TCP header control bits from RFC 793 have also been updated based on RFC 3168.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.




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