In the description, it is a protocol designed for time transfer over a network. It works through a hierarchy of several layers, starting with 0 Stratumsedijk the external time source. Stratum 1 is the exact time of a hardware clock which can be obtained through GPS signals as they are the safest and most reliable. This is due to the number of satellites around the Earth at any given time. References are not limited to what the radio signals and sends a relatively safe and reliable time. The diffusion of different places and are not as central as the GPS signals, but they have all the time, if not identical. Common rules are the UK MSF, JJY and WWVB in Japan, the United States.

Reliability is the main problem concerns the need to safeguard the reference clocks in the unlikely event of a signal failure. These references to the times with the same precision as the signals and are capable of remaining for longer periods until the signals are recovered. The back-ups are expensive and why they should be more than the previous one for the reasons. If you decide that you need the time there are crystal oscillators at a good price.

NTP client software is usually provided with most OS. Linux is the GNU Public License Windows NTP client has Windows Time service. The advantage of NTV is that servers to ensure that the timestamp of the transactions are executed in order. They are the missing link between the distribution and time on a global scale and time should be an integral part of a company or organization.