As a computer network to synchronize with the Time Protocol (NTP)

Synchronization of modern computer networks is crucial for a number of reasons, and due to time protocol NTP (Network Time Protocol), this is relatively simple.

NTP is a protocol for the analysis of algorithmic time on different computers and compares it with a single reference clock time and adjust for any drift in synchronization with the source of time guaranteed. NTP is capable of this task, which can be synchronized with the network protocolmillisecond to get realistic.

The choice of time source

When it comes to establishing a time reference, there's really no alternative, as a source of UTC (Coordinated Universal Time) to find. UTC is a time scale global networks used throughout the world as a time scale of a single computer. UTC is always just around the world through a constellation of atomic clocks.

Synchronizing UTC

The easiest to use, after receiving the UTC Time Sourcea layer of public time servers 2. These are the layer-2, as the time after receiving the first spread from an NTP server (stratum 1), which is connected to an atomic clock (layer 0). Unfortunately, this is not the most accurate method of receiving UTC because of the distance data on the client-host of the trip.

There are also security issues associated with using an Internet layer 2 source UDP port 123 firewall must be left open, since theTime-code, but this firewall opening and has been used by fraudsters.

Dedicated NTP servers

Dedicated NTP servers, often referred to as a time server network, the precise and safe method to synchronize over a computer network. They work outside the network, so no firewall problem. This layer 1 devices receive UTC time directly from an atomic clock source, or long wave radio waves or the GPS network (GlobalPositioning System). Although this requires an antenna, which in the case of GPS, and must be placed on the roof, the server automatically synchronizes the time of hundreds or even thousands of different networked devices.

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