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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 .
This implementation is used by Google (both internally and on their public NTP servers), Amazon AWS, [68] and Facebook. [69] chrony supports leap smear in smoothtime and leapsecmode configurations, but such use is not to be mixed with a public NTP pool as leap smear is non-standard and will throw off client calculation in a mix. [70]
UTC (variant depends on server's time source) ClockWatch Pro for Windows [22] Time Protocol Network Time Protocol: 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 ...
All a dedicated time server does is provide accurate time. 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.
Due to excessive bandwidth usage, averaging upwards of 20 GB / day, it has become necessary to direct external usage to public time server pools, such as ch.pool.ntp.org. Misuse, caused mostly by IT-providers synchronizing their client infrastructures, has made unusually high demands on network traffic, thereby causing ETH to take effective ...
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]
The U.S. Naval Observatory provides public time service via 26 NTP [33] servers on the public Internet, [36] and via telephone voice announcements: [37] +1 202 762-1401 (Washington, DC) +1 202 762-1069 (Washington, DC) +1 719 567-6742 (Colorado Springs, CO) The voice of actor Fred Covington (1928–1993) [38] has been announcing the USNO time ...
The ntpd program is an operating-system daemon that sets and maintains a computer system's system time in synchronization with Internet-standard time servers.It is a complete implementation of the Network Time Protocol (NTP) version 4, but retains compatibility with versions 1, 2, and 3 as defined by RFC 1059, RFC 1119, and RFC 1305, respectively. ntpd performs most computations in 64-bit ...