National Cyber Range

Overview
The development of the National Cyber Range will allow DoD, other U.S. government entities, and potentially non-U.S. government partners to test and evaluate new cyberspace concepts, policies, and technologies. Although the U.S. military routinely exercises units on target ranges and in a variety of simulations, DoD has had limited capability to simulate cyberspace operations. The National Cyber Range, which allows the rapid creation of numerous models of networks, is intended to enable the military and others to address this need by simulating and testing new technologies and capabilities.

Source

 * Department of Defense Strategy for Operating in Cyberspace, at 12.