Network Time Protocol (NTP) is a synchronization time protocol that serves computer clock through the Internet. It provides a synchronous time mechanism that can be assigned in a huge and complex diverse Internet. It uses the return time design, which features a time server is a distributed subsidiary, self-organizing operation, hierarchical management configuration, through wired or wireless mode synchronous logic clock to national standard time. In addition, the server can reassign standard time through the local routing algorithm and time background program.
NTP's design brings three products-clock offsets, time delay, and differences, all of which are associated with the specified reference clock. The clock offset indicates the number of deviations generated by the local clock and the reference clock; the time delay represents the delay time between the message and the reference clock within the specified time; the difference indicates the maximum deviation error of the local clock relative to the reference clock. . Because most host time servers reach synchronization through other peer-to-peer servers, each of the three products have two components: one is part of the peer-based decision, this part is relative to the original standard time. In the source of reference; the second is part of the host, which is relative to the peer. Each section is independently maintained in the agreement, so that the error control and the management operation of the subnet itself become easy. They not only provide precision measurements of offset and delay, but also provide a clear maximum error range so that the user interface can not only determine the time, but also determine the accuracy of the time.
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