Atomic clocks – the key to network synchronization
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Sourcing the right time for network synchronization is possible only thanks to atomic clocks. Compared to standard timing devices, and millions of times more accurate atomic clock with the most innovative design is the exact moment one second in 100,000 years.
Atomic clocks use the constant response of the atoms in different energy states, the time to measure the performance of a nuclear tick that occurs almost 9 billion times per second, in the case of a cesium atom. Indeedthe resonance of cesium is the official definition of a second has been adopted by the International Unit (SI).
These clocks are the basis for the international use of time, UTC (Universal Time Coordinated). And also the basis for the NTP server to synchronize the time, computer networks and technologies, like the other by air traffic control and high-level time-sensitive applications.
Finding a source of atomic clock Clock is a simpleProcedures. Especially with the presence of sources that are at the time when Microsoft and supplied by the National Institute of Standards and Time (windows.time.com and nist.time.gov).
However, these NTP servers are what are known as the middle layer 2 devices that are to any other device, which is now the time to an atomic clock (in other words, a second-hand source is connected to the clock).
While the accuracy of this layer-2 server is not a question of them may be influenced bythe distance between the client-server since they are outside the firewall means that any communication requires a server-time online is an open UDP (User Datagram Protocol) port to allow communication.
This can cause failures in the network and not used for this reason, any system that requires a complete security. A secure (and reliable) method of receiving Clock is an NTP server to use. To receive this time of synchronization devicesthe time from atomic clocks, either directly broadcast on long wave from places such as NIST or NPL (National Physical Laboratory – UK). Alternatively, the clock can be started from the GPS signal through the constellation of satellites in the GPS network (Global Positioning System Broadcast derivatives).
Computer-network 