NTP server with reference to the common task

The NTP server (Network Time Protocol) is one of the most commonly used, but less good for IT networks points.

A server is only an NTP time server NTP protocol. Another time before the NTP protocol, but is by far the most commonly used. The terms "NTP server," "Time Server" and "Network Time Server" are interchangeable, and often is the word "radio" or "GPS time server" are used, but they only describe the method that the serverTime to time with a reference.

NTP servers receive a source of time can be distributed in a network. NTP verify the Systemuhrungenauigkeiten and push forward or rewind time, depending on the quantity was abducted. Followed by the regular system clock with the time server, NTP can ensure that the device is synchronized.

The NTP server is a simple device to install and run. Mostconnect with a network mit an Ethernet cable and the software is easy to configure. However, there are problems communss in solving the problems associated with the NTP server, and in particular the inclusion of sources schedule:

NTP is a dedicated server will receive one from various sources. The Internet is probably the most common sources of UTC (Coordinated Universal Time), but with the Internet as a source of opportunities kanneine cause for various problems of ZeIt server.

First of all possible sources on the Internet the timetable could not be authenticated, the authentication NTP in the construction of a security of Measuring and ensures that the timetable on the sdic comes, where he is. In a similar evaluation with the help of an Internet source for the timetable means that the gap in the network firewall, obviously, this may be their own security.

Internet SOCER calendarare notoriously inaccurate. A Untersuchung by the MIT (Massachusetts Institute of Technology) has found less than a quarter of Internet sources on a schedule close to need and are often those who are too far away from the customer a reliable time.

The joint, safe and accurate method of measuring time is the Global Positioning System (GPS). If a GPS signal can lead anywhere in the world there are still problems installation.

A GPS antenna must have a good look at the sky, cuil of the GPS satellites to transmit its signal on the vision. Signal that does not penetrate into the building, and the antenna is in the Rood. Another problem, such as a GPS server time is the need, on the left at least 49 hours to the GPS receiver gets a good-satellite test. Many believe that they receive a signal interval, which is normally due to impatience and not let the GPS system to a good correction.

The other safe and reliable Methode for the reception of a signal moment is the national radio broadcasts. In Britain, the so-called SPS, but there are similar systems in the United States (WWVB), Germany (DCF) and several other countries. Normally there are fewer problems when they enfrentan Noselli Ing MSF / DCF / WWVB signal. Biin that the radio can not enter the buildings are vulnerable to interference from the topography and other electrical devices. Every problem with a server MSF time gelEast may be in the rule by switching to another place or the fishing often that the server of his building at the antenna perpendicular to di