The Network Time Protocol is a networking protocol that allows computer systems to synchronise their clocks via packet-switched networks

 The software on the NTP- Network Time Protocol server, which runs on any server/computer platform, is referred to as a "network time server." It is used to describe a network appliance (tray mount, rack, etc.) that obtains and uses time from an external source to keep time within its own internal clock and then supplies time to its linked network. The Network Time Protocol (NTP) is used to do this.

We can also say, The Network Time System (NTP) is a protocol that allows computers on a network to synchronise their clock times. The synchronisation of hosts on a TCP/IP network is handled by this protocol, which is an application protocol. David Mills created NTP Server at the University of Delaware in 1981. This is essential in a communication system so that the computers may communicate seamlessly.


The accuracy of time-stamping in applications ranges from 1 millisecond to 1 second, and it typically reflects the chain of events or order of occurrence. Even a one-millisecond disparity is unacceptable in today's highly savvy world. Timestamps in NTP offer a precise order of events and occurrences, necessitating the synchronisation of the NTP server and its NTP pool network. All network actions that require high accuracy are typically time-stamped in the range of 1-10 milliseconds. When you use NTP sync to synchronise the NTP server, you can leverage its common built-in time-base to precisely record time and avoid costly downtime issues. Network recovery is an example of a transaction that requires correct time processing on an NTP server port.

Time delivery is the responsibility of the operating system. Complex processes are used by the NTP application programme on the client-server to compute the time offset and subsequently adjust the clock on the client-server. Different computers have different hardware implementations of the protocol and computer clocks. NTP servers with built-in clocks are used by the majority of third-party systems. If the system is not NTP aware, the NTP protocol or NTP UNIX must be downloaded and installed, which requires technical instructions and is best done by an expert.

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The number of hops between the server and the client, as well as network delay, affect accuracy. This can range from 1 to 10 milliseconds across a WAN (Wide Area Network). It fluctuates between 0.5 and 2 milliseconds over a LAN (Local Area Network). The internal clock accuracy is less than 50 nanoseconds when GPS is used. The NTP port's timestamp accuracy is less than 14 microseconds in what is NTP with GPS signals.

NTP is an application layer protocol that uses a hierarchical system of time resources to facilitate synchronization across stratum servers. First, there are highly accurate time resources, such as atomic or GPS clocks, at the highest level. These clock resources are known as stratum 0 servers, and they are connected to the NTP servers below, which are known as stratum 2 or 3, and so on. These servers then offer the most up-to-current date and time to ensure that all interacting hosts are in sync.

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