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  2. Network Time Protocol - Wikipedia

    en.wikipedia.org/wiki/Network_Time_Protocol

    Often a stratum 2 computer queries several stratum 1 servers. Stratum 2 computers may also peer with other stratum 2 computers to provide more stable and robust time for all devices in the peer group. Stratum 3 These are computers that are synchronized to stratum 2 servers. They employ the same algorithms for peering and data sampling as ...

  3. Time server - Wikipedia

    en.wikipedia.org/wiki/Time_server

    The stratum indicates the place of a particular time server in a hierarchy of servers. The scale is 1 to 15 where 1 is the most accurate and likely a highly specialized physical hardware device. Some time clients will reject a time update from a server whose stratum is too high, and most will prefer low strata time sources to higher ones. This ...

  4. Time synchronization in North America - Wikipedia

    en.wikipedia.org/wiki/Time_synchronization_in...

    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 ...

  5. NTP pool - Wikipedia

    en.wikipedia.org/wiki/NTP_pool

    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.

  6. List of PTP implementations - Wikipedia

    en.wikipedia.org/wiki/List_of_PTP_implementations

    TimeKeeper PTP server and client from FSMLabs, Inc. [96] TSEP Chronos: IEEE 1588 PTP 2008 Stack for Windows, Linux, and RTX64(IntervalZero) from Technical Software Engineering Plazotta. [97] TsEX module of the NeEX platform - IEEE1588 compliant PTP stack by emagine [98] UMAN PTP Stack - 802.1AS (gPTP), Automotive PTP 1.5. [51]

  7. NTP server misuse and abuse - Wikipedia

    en.wikipedia.org/wiki/NTP_server_misuse_and_abuse

    In 2005 Poul-Henning Kamp, the manager of the only Danish Stratum 1 NTP server available to the general public, observed a huge rise in traffic and discovered that between 75 and 90% was originating with D-Link's router products. Stratum 1 NTP servers receive their time signal from an accurate external source, such as a GPS receiver, radio ...

  8. OpenNTPD - Wikipedia

    en.wikipedia.org/wiki/OpenNTPD

    OpenNTPD (also known as OpenBSD NTP Daemon) is a Unix daemon implementing the Network Time Protocol to synchronize the local clock of a computer system with remote NTP servers. It is also able to act as an NTP server to NTP-compatible clients. OpenBSD NTP Daemon was initially developed by Alexander Guy and Henning Brauer as part of the OpenBSD ...

  9. Toronto Internet Exchange - Wikipedia

    en.wikipedia.org/wiki/Toronto_Internet_Exchange

    Since 2012, TorIX has been hosting a cluster of Network Time Protocol (NTP) servers for use by the Internet as a whole. Using servers which sync to both GPS and CDMA sources, the TorIX NTP cluster is a stratum 1 time source.