Network Time Protocol (NTP) Network Time Protocol (NTP) is a protocol used to synchronize computer clock times in a network. It belongs to and is one of the oldest parts of the TCP/IP protocol suite. The term NTP applies to both the protocol and the client-server programs that run on computers. NTP, which was developed by David Mills at the University of Delaware in 1981, is designed to be highly fault-tolerant and scalable. How does NTP work? The NTP client initiates a time-request ex...