What is Network Time Protocol (NTP)

[Tarjan]

Hi,

I am new in the networking field. I want to know what is Network Time Protocol ??? I know that to synchronize the internal clock of the computer, using networks with variable latency. Please explain me in detail about the same .

[blindsleeper]

NTP uses for its work protocol UDP. NTP system is extremely resistant to changes in latency of the transmission medium. NTP uses Marzullo algorithm (suggested by Keith Marzullo (Keith Marzullo) from the University of California, San Diego), including such features as integration time of transmission. In version 4 is able to achieve accuracies of 10 ms (1 / 100 s) at work through the Internet, and up to 0.2 ms (1 / 5000) and better within the local networks.

[Zenon]

NTP - one of the oldest used protocols. NTP is designed by David L. Mills (David L. Mills) from the University of Delaware and currently continues to improve. Current version - NTP 4. NTP uses a hierarchical system of "time levels. Level 1 synchronized with high-precision clock, for example, the system of GPS or atomic time standard. Level 2 is synchronized with one of the machines level 1, and so on.

[Michael25]

The NTP Version 3 is the most successful to date, it specifies several aspects:

• description of the network protocol;
• modes of operation;
• algorithms to implement in machines.

The development of this protocol and algorithms have been conducted in conjunction with the development of software complies with these specifications. Thus, this project serves as a reference in the field and is called NTP Software.

[Astalavista]

The timestamps used by NTP consist of a second 32-bit and a fractional part of 32-bit, taking with it a scale of 2 32 seconds (136 years), with a theoretical resolution of 2 seconds (0.233 nanoseconds ). While NTP time scales are rounded every 2 seconds, implementations should disambiguate NTP time using the approximate time from other sources. This is not a problem in general use since it only requires a time close to a few decades.

[ameer123]

Network Time Protocol (NTP) is the most complex, a complex time protocols which provides the best performance. Is typically used by the NTP workstations or large computers because the NTP, which is often bundled with the operating system. The client software works continuously on the background task that periodically gets updates from the server.