The Defense Research and Engineering Network (DREN) is a U.S. Department of Defense (DoD) research network. It is DoD's recognized research and engineering network. The DREN is a robust, high-capacity, low-latency, nationwide network that provides connectivity between and among the HPCMP's geographically dispersed High Performance Computing (HPC) user sites, HPC Centers, and other networks.
The DREN Wide Area Networking (WAN) capability is provided under a commercial contract. The DREN WAN service provider has built DREN as a virtual private network based on its commercial infrastructure.
The DREN provides digital, imaging, video, and audio data transfer services between defined service delivery points (SDPs). SDPs are specified in terms of WAN bandwidth access, supported network protocols (Multi Protocol Label Switching, Internet Protocol (IP), Asynchronous Transfer Mode (ATM)), and local connection interfaces. DREN currently supports both IP version 4 (IPv4) and IP version 6 (IPv6) at bandwidths from DS-3 (45 Mbps) at user sites up to OC-48c (2.488 Gbps) at selected HPC Centers. Future bandwidths will scale even higher.
Expansions or enhancements to the DREN as a whole are accomplished through the addition of defined SDPs or modifications to the operating specifications of existing SDPs. The sites connected by DREN services may be at virtually any location in the continental United States, including Alaska and Hawaii, and at OCONUS sites.