[[PageOutline]] = CloudLab = The [https://www.cloudlab.us/ CloudLab] infrastructure environment allows experimenters to build their own clous distributed across three sites: University of Utah, Universtiy of Wisconsin, and Clemson University. Each cluster has a different focus: storage and networking (using hardware from Cisco), high-memory computing (Dell), and energy-efficient computing (HP). !CloudLab is interconnected with nationwide and international infrastructure from Internet2, so it is possible to extend private, software-defined networks to every host.