Defense Data Network


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Defense Data Network

(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.
References in periodicals archive ?
TWLAN's heavily-used E-mail setup also allows users to send Defense Data Network (DDN) messages directly from the network.
These are the Defense Data Network (DDN), the Defense Message System (DMS), the Integrated Tactical-Strategic Data Network (ITDN), the Integrated Communications Architecture (ICA) and the Joint Multi-Level Security Technology Insertion Program (MLS TIP).
Since communications is such an important part of SIMS, plans call for linking all SIMS sites to the Defense Data Network (DDN).

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