Information Systems Network
The Defense Information Systems Network is the global, end-to-end, information transfer infrastructure of the DOD. The Defense Information Systems Network provides the communications infrastructure and services needed to satisfy national defense command, control, communications, and intelligence requirements and meet worldwide U.S. defense requirements. The purpose of the Defense Information Systems Network is to enable rapid, reliable and secure information access to conduct effective military operations, and, in particular, to allow any warrior to perform any mission, any time, any place in the world, based on information needs. The network's architecture prescribes a global network integrating DOD-wide communications systems assets, military satellite communications, commercial satellite communications initiatives, leased telecommunications services, dedicated DOD service and defense agency networks, and mobile/deployable networks, i.e., the consolidated worldwide enterprise-level telecommunications infrastructure that provides the end-to-end information transfer component of the Defense Information Infrastructure (DII).
The Defense Information Systems Network infrastructure
consists of the sustaining base (i.e., base/post/camp/station) C4I
infrastructure (including legacy systems) that interfaces with the long-haul
network in order to support the deployed warfighter with reach-back services,
the long-haul telecommunications infrastructure (including today's defense
communications systems and the communication systems and services between the
fixed environment and the deployed (joint task force/combined task force)
warfighter), and the deployed warfighter and associated telecommunications
infrastructures that support the joint task force/combined task force.