August 1999
Intermediate to advanced
328 pages
8h 50m
English
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NETWORK TIME PROTOCOL (NTP)
The network time protocol (NTP), published in Request for Comments (RFC) 1119, is used for time-stamping operations.
Clocking information for a network is provided through the primary time server designated as a root. The time server obtains its clocking information from master sources. In the United States, this is usually one of three sources:
Fort Collins, Colorado: Station WWV operated by the National Institute of Standards and Technology (NIST) uses high frequency (HF) frequencies
Kauai, Hawaii: Station WWVH operated by NIST, also uses HF frequencies
Boulder, Colorado: Station WWVB uses low frequency transmissions
The primary and secondary time servers to calculate clock offsets and correct clocking inaccuracies. ...