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The NTP pool is a dynamic collection of networked computers that volunteer to provide highly accurate time via the Network Time Protocol to clients worldwide. The machines that are "in the pool" are part of the pool.ntp.org domain as well as of several subdomains divided by geographical zone and are distributed to NTP clients via round-robin DNS.
The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks. In operation since before 1985, NTP is one of the oldest Internet protocols in current use. NTP was designed by David L. Mills of the University of Delaware.
Eastern Indonesia Time (Waktu Indonesia Timur, WIT) is nine hours ahead , used in the Maluku Islands and Western New Guinea. In 1908, during the Dutch East Indies colonial era, only Java and the Madura Island were initially given time until 1932, when the government utilised UTC+06:30 up to +09:30 .
An existing network server (e.g. a file server) can become a time server with additional software. The NTP homepage provides a free and widely used reference implementation of the NTP server and client for many popular operating systems. The other choice is a dedicated time server device.
pool.ntp.org: Computer with NTP client that syncs at least once an hour. ntpd, sntp, ntpdate: Meinberg NTP [23] NetTime [24] ToyNTP [16] BktTimeSync by IZ2BKT [17] NTPSec Precision Time Protocol: Domain Time II [25] NIST Telephone Time of Day Service [26] UTC(NIST) + 1-303-499-7111 + 1-808-335-4363; Voice announcement with sync pips. Telephone ...
Many Unix-like operating systems used the Time Protocol to monitor or synchronize their clocks using the rdate utility, but this function was superseded by the Network Time Protocol (NTP) and the corresponding ntpdate utility. NTP is more sophisticated in various ways, among them that its resolution is finer than one second.
In the fall of 2024, Yandex introduced a bug in the firmware of their speaker product, causing a massive overload [24] of Russian NTP servers in the NTP pool. [ 25 ] Although Yandex was rolling out the new firmware gradually across their installed base, the full extent of the problem was not detected until 100% of the firmware had been updated.
It is an alternative to ntpd, a reference implementation of NTP. It runs on Unix-like operating systems (including Linux and macOS) and is released under the GNU GPL v2. [4] It is the default NTP client and server in Red Hat Enterprise Linux 8 and SUSE Linux Enterprise Server 15, [5] [6] and available in many Linux distributions. [7] [8] [9]