NTP (Network Time Protocol) server is one of the most used computers, yet the least understood between the networks of hardware for computers. An NTP server is only a time server that uses the NTP Protocol. There are other protocols of time but the NTP is the most used. The terms server NTP, time server and network time server are interchangeable and, often, the terms radio clock or time server GPS are used, but they simply describe the method that time servers receive as time reference. NTP servers receive a time source that can be distributed between a network. NTP check a clock system devices and advances or reverses time, depending on how it has shifted.
Periodically controlling the clock with the time server, NTP can ensure that the device is synchronized. The NTP server is a simple to install and run the device. Most are connected to a network using an Ethernet cable and the included software is easy to set up. However, there are some common troubleshooting problems associated with NTP servers and, in particular, with the reception of sync sources: A dedicated NTP server will receive a time signal from different sources. The Internet is probably the most common source of UTC (Universal coordinated time) time, however, using the Internet as a source of time can be a cause for various problems of the time server.
First Internet time sources can not be authenticated; authentication is a built-in NTP security measure, and ensures that a reference of time comes from stating that it is. On a similar note, use an Internet sync source would mean that a gap would have to be created in the network firewall, obviously this could cause its own problems of security. Internet time sources are also notoriously inaccurate. A survey conducted by MIT (Massachusetts Institute of technology) found that less than a fourth part of Internet time sources were even close to precision and, often, those that were, were too far from customers as to provide a reliable source of synchronization. The most common, safe and accurate method to receive a time source is GPS (Global Positioning System) system. Although a GPS signal can be received in any part of the planet still exist common installation problems. A GPS antenna should have a good clear view of the sky; This is due to that the spread of satellites GPS your signal is given by line of sight. This signal can not penetrate into buildings and, therefore, the antenna must be located on the roof. Another problem with a GPS time server is that they have to be left on the site at least 49 hours to ensure that the GPS receiver receives a good review by satellite. Many users believe that they are receiving an intermittent signal, this is normally due to impatience and not leave GPS system to get a solid review. Another safe and reliable method to receive a synchronization signal are national radio broadcasts. In the United Kingdom, conocida known as MSF, but there are similar systems in the United States.UU. (WWVB), Germany (DCF) and several other countries. There are usually fewer problems faced when using the MSF signal / DCF / WWVB. While the radio signal can penetrate into buildings it is susceptible to interference from the topography and other electrical appliances. Any problem with an MSF time server can normally be resolved by moving the server to another location or moving of the angular server in such a way that its built-in antenna becomes perpendicular to the transmission.