|
|
|
|
Home》Time Dissemination/
NTP Services
|
|
 |
|
|
NTP Services
|
|
One of the most important time synchronization services we provided for the populace is the Network Time Synchronization Service. The Network Time Synchronization Service uses Network Time Protocol (NTP) to synchronize clocks of computers in the Internet with national standard time. NTP builds a time tracking system in a hierarchical structure. The NTP timeserver with lower hierarchy is synchronized to that with higher one. NTP can estimate the network propagation delay and compensate the effect of delay for adjusting the local computer clock. In the Internet, the accuracy of NTP is about a few tens of milliseconds. Thus, it can provide an accurate time source for most information applications, including the Time Stamp Authority (TSA) application.
We have begun to provide the Network Time Synchronization Service since June 1998. We installed multiple NTP timeservers in our Lab. and developed a friendly client program implementing Simple Network Time Protocol (SNTP) for Windows OS environments, such as Windows 95/98/NT. In addition, we also designed a system to monitor our NTP services and the monitoring program is used to count the number of NTP access to our NTP timeservers. Up to October 2000, the number of NTP requests is more than two million (2,000,000) connections a day. NTP provides an authentication option to implement the security function. However, the present version client program does not implement any authentication function. To design a powerful authentication mechanism for our NTP system would be the future work.
|
|
|
