What is an NTP Server?

A.

NTP (Network Time Protocol) is a protocol used to synchronize the time between network devices. An NTP server is a device that provides time synchronization to other devices in the network.

Regarding the given options:

A. It answers using UTC time: This option is correct in the sense that NTP servers generally use Coordinated Universal Time (UTC) as their reference time standard. UTC is a globally recognized time standard that is independent of time zones, so it provides a common reference point for devices in different locations.

B. It uses the local time of the server with its time zone indication: This option is not correct because an NTP server does not typically use the local time of the server with its time zone indication. This is because the local time of the server may be subject to changes due to daylight saving time or other factors, which could cause confusion for devices that rely on the NTP server for time synchronization.

C. It uses the local time of the server and does not indicate its time zone: This option is not correct because an NTP server typically does not use the local time of the server without indicating its time zone. As mentioned earlier, UTC is the standard time reference used by NTP servers, and local time without time zone indication can be ambiguous.

D. It answers using the time zone of the client: This option is not correct because an NTP server does not typically use the time zone of the client to answer requests for time synchronization. The purpose of an NTP server is to provide a common reference time standard, which is usually UTC.

In summary, option A is the correct answer. NTP servers typically use Coordinated Universal Time (UTC) as their reference time standard when answering requests for time synchronization.