The Network Time Protocol NTP is a protocol for the adjustment of system clocks on computers and other network-compatible devices.

At the University of Paderborn, time.uni-paderborn.de can be used for this purpose, which is DNS round-robin between two NTP servers operated by the ZIM, which obtain their time from the public NTP servers of the Physikalisch-Technische Bundesanstalt in Braunschweig. In addition, a radio clock (DCF77 time signal) is connected, which is of essential importance for network operation, if the external connection fails.