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NTP (Network Time Protocol)
Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
NTP is an Internet protocol that devices can use to obtain the most accurate time possible via radio or atomic clocks at various locations on the Internet. The protocol can synchronize the time of a computer client or server to another server or reference time source. Time provided by NTP servers is typically accurate within milliseconds.
SNTP (Simple Network Time Protocol) is an adaptation of the NTP, which is used to synchronize computer clocks in the Internet. SNTP can be used when the ultimate performance of the full NTP implementation described in RFC-1305 (Network Time Protocol Version 3, March 1992) is not needed or justified.
Refer to the following RFCs for more information:
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.