rfc-958

Network Time Protocol (NTP)

D.L. Mills

date1985-09 streamLegacy statusUNKNOWN pages14 canonicalhttps://www.rfc-editor.org/rfc/rfc958 doi10.17487/RFC0958

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.

obsoleted by

rfc-1059 — Network Time Protocol (version 1) specification and implementation
rfc-1119 — Network Time Protocol (version 2) specification and implementation
rfc-1305 — Network Time Protocol (Version 3) Specification, Implementation and Analysis