The S1U2001-MDSW “Pit Viper” is an ultra-rugged, 1U rack mount, lightweight multi-domain server system with up to 16 CPU cores, multi-port Ethernet switch, and removable drives. It is designed to provide two fully-independent and isolated high-performance servers, as well as a 14-port intelligent hardware switch/router sub-system supporting Layer 2/3 routing functions with customizable rules—all in a 1U high box. It provides the highest level of workstation performance possible in a fully ruggedized, convection-cooled system, operating from -20°C to +75°C. Even the AC or DC power supplies are separate to assure full isolation. This system architecture simplifies deployable MIL-SPEC technology by Multiple Independent Levels of Security (MILS), NSA Red/ Black network separation, or system redundancy, while integrating processing, storage and high speed I/O in a small, ultra-rugged 1U high rack-mount enclosure with the greatest possible performance per dollar and per watt.