Network Time Protocol (NTP), September 1985
- Canonical URL:
- File formats:
- Obsoleted by:
- RFC 1059, RFC 1119, RFC 1305
- D.L. Mills
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This document describes the Network Time Protocol (NTP), a protocol for synchronizing a set of network clocks using a set of distributed clients and servers. NTP is built on the User Datagram Protocol (UDP), which provides a connectionless transport mechanism. It is evolved from the Time Protocol and the ICMP Timestamp message and is a suitable replacement for both. This RFC suggests a proposed protocol for the ARPA-Internet community, and requests discussion and suggestions for improvements.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 4844.