Computer network – one of the most difficult aspects of information and communication technologies (ICTs). Logistics connection terminals, routers, printers and other devices – a headache. One of the most important aspect that is often overlooked, which in turn leads to deplorable consequences – time synchronization. It is necessary that the time for all devices on the network to coincide with the time stamp of the format, with which Computers broadcast time to each other – the only reporting system that uses a computer to determine the sequence of events. If the machine will show the same network at different times, there may be unintended consequences, such as e-mail will come sooner than it technically was sent. Case and other anomalies, which only reinforce the administrative headaches. Moreover – Security unsynchronized network is always under the threat of fraud. Fortunately, the NTP time server is used for many years and makes the headache associated with the synchronization time.
NTP (Network Timing Protocol Time) – one of the oldest protocols used by computer networks. Designed nearly three decades ago, NTP – a protocol that checks the time on all network devices and adds or takes away some amount of time, ensuring their synchronization. NTP requires time reference to synchronize the clock network. Since NTP can synchronize the network to any time, not required to have an authoritative time source. UTC (Universal Koordinovannoe time) – is an internationally used scale of time based on time, which shows an atomic clock. Since atomic clocks are losing less than a second time for over a thousand years, UTC is the best time source to synchronize the network. Thus, your network will not only be perfectly synchronized inside, it will also be synchronized in time with the millions of computers worldwide.
The NTP server can receive standard UTC time from multiple sources. The most common source is the Internet, however, time sources on the Internet are not always accurate and inaccurate sources are unlikely to any creep at large rasstayanii. And if you place an NTP server firewall is netseloobraznym keep it open and allow the NTP server to collect resources across the network and thus the threat to expose the entire network, ishdya especially from the fact that NTP-authentication (security precaution of the NTP) is not possible on the Internet. There are two much more reliable and accurate method for obtaining a time standard UTC. The first – to use the national time and transfer of the frequencies transmitted by physical laboratories in different countries. Basically it is the long-wave broadcasting, the advantage of them – the opportunity to catch them in the server room, although in many countries using such signals. Many of the NTP-servers, however, can catch the clock signal that is transmitted by atomic clocks built satellites GPS. This signal is available everywhere, but it takes a GPS-antenna with a net visibility of the sky. At using a source of UTC time using the GPS network or radio, you can synchronize your network to a few milliseconds of time UTC.