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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.
This article lists protocols, categorized by the nearest layer in the Open Systems Interconnection model.This list is not exclusive to only the OSI protocol family.Many of these protocols are originally based on the Internet Protocol Suite (TCP/IP) and other models and they often do not fit neatly into OSI layers.
chrony is an implementation of the Network Time Protocol (NTP). 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]
Antenna-integrated OTMC 100 PTP grandmaster clock from OMICRON Lab [55]; AVN-GMCS IEEE1588 PTP Grandmaster Clock with GPS Receiver from Sonifex [56]; Calnex Solutions provides a number of IEEE 1588v2 test products for field and factory use including Paragon-X, Paragon-100G and Sentinel [57]
The Precision Time Protocol (PTP) is a protocol for clock synchronization throughout a computer network with relatively high precision and therefore potentially high accuracy. . In a local area network (LAN), accuracy can be sub-microsecond – making it suitable for measurement and control systems.
A typical commercial time server in rackmount form factor. (Elproma front panel). A time server is a server computer that reads the actual time from a reference clock and distributes this information to its clients using a computer network.
The Time Protocol is a network protocol in the Internet Protocol Suite. [1] Its purpose is to provide a site-independent, machine readable date and time. The Time Protocol may be implemented over the Transmission Control Protocol (TCP) or the User Datagram Protocol (UDP).
David Lennox Mills was born in Oakland, California, on June 3, 1938. [2] [3] His mother, Adele (née Dougherty), was a pianist, and his father, Alfred, was an engineer.[4] [3] He had glaucoma since birth, but a surgeon saved some of the vision in his left eye when he was a child. [2]