What is Network Time Protocol?
{{IPstack}} The '''Network Time Protocol''' ('''NTP''') is a protocol for distributing the [[Coordinated Universal Time]] (UTC) by [[clock synchronization|synchronizing the clocks]] of computer systems over [[Internet Protocol|IP]] [[network]]s. NTP is one of the oldest [[Internet Protocol]]s still in use (since before 1985) and uses [[User Datagram Protocol|UDP]] [[TCP and UDP port|port]] 123. ==References== {{Reflist|1}} * {{cite book | last = Mills | first = David L. | title = Computer Network Time Synchronization: The Network Time Protocol | date = 24 March 2006 | publisher = Taylor & Francis / CRC Press | isbn = 0849358051 }} ==Other websites== <!-- Note that links to software or manufacturers will be removed. Wikipedia is not a web directory, and has an explicit external links policy --> * [http://support.ntp.org/ NTP Public Services Project] This is the home for the NTP (Network Time Protocol) Public Services Project which provides public support for the NTP Project and the IETF NTP Working Group. Also a Wiki with lists of NTP servers. * [http://www.ietf.org/html.charters/ntp-charter.html IETF NTP working group] * [http://www.eecis.udel.edu/~mills/ntp.html David Mills' NTP project page] * [http://www.eecis.udel.edu/~mills/ntp/html/release.html NTP version 4 Release Notes] * [http://www.ijs.si/time/ Time and NTP paper] * [http://news.galsys.co.uk/ NTP Articles and News] {{Webarchive|url=https://web.archive.org/web/20080927172945/http://news.galsys.co.uk/ |date=2008-09-27 }} - A collection of NTP related articles and news * [http://www.ntpsurvey.arauc.br NTP Survey 2005] {{Webarchive|url=https://web.archive.org/web/20190504164134/http://ntpsurvey.arauc.br/ |date=2019-05-04 }} * [http://inms-ienm.nrc-cnrc.gc.ca/time_services/network_time_protocol_e.html Network Time Protocol] {{Webarchive|url=https://web.archive.org/web/20080501195449/http://inms-ienm.nrc-cnrc.gc.ca/time_services/network_time_protocol_e.html |date=2008-05-01 }} - National Research Council of Canada * [http://nts.softros.com/ser