What is an NTP Server?
NTP (Network Time Protocol) is a protocol used to synchronize clocks between computer systems over a network. It is used to maintain accurate time on computers, servers, and other networked devices. NTP servers provide the time information to clients, which then use the information to adjust their own system clocks.
Why Would I Need to Query an NTP Server?
When you are running a network of computers, it's important to have them all synchronized to the same time. This allows applications and services to accurately track time-dependent events, such as logging and authentication. Querying an NTP server is the best way to ensure that all the computers on your network are set to the same time.
How Can I Query an NTP Server Under Windows?
The simplest way to query an NTP server under Windows is to use the Windows Time Service (W32Time). This service is included with Windows and is used to synchronize the system clock with a remote NTP server.
To query an NTP server using W32Time, open the Command Prompt window and type:
This will cause Windows to query the remote NTP server and adjust the system clock accordingly.
If you want to specify a particular NTP server to query, use the following command:
w32tm /config /manualpeerlist:
If you want to query multiple NTP servers, separate each address with a space. For example:
w32tm /config /manualpeerlist:time1.example.com time2.example.com
You can also set W32Time to periodically query an NTP server by using the following command:
w32tm /config /update
This will cause Windows to query the remote NTP server at regular intervals, ensuring that the system clock is always accurate.
Querying an NTP server is an important task for any IT administrator. It ensures that all of the computers on the network are set to the same time, which is essential for many applications and services. Querying an NTP server under Windows can be easily accomplished using the Windows Time Service (W32Time). With the commands outlined above, an IT administrator can manually query an NTP server or configure W32Time to periodically query a server, ensuring that the system clock is always accurate.