(DDN) A global communications network serving the US
Department of Defense. Composed of MILNET, other portions
of the Internet, and classified networks which are not part
of the Internet. The DDN is used to connect military
installations and is managed by the Defense Information Systems Agency.
The FDDI network will be the principal means of providing data communications at Fort Monmouth; it will support electronic mail, transfer of CAD/CAM drawings, and access to the Defense Data Network (DDN).