BranchCache is a wide area network (WAN) bandwidth optimization technology that is included in some editions of the Windows Server® 2008 R2 and Windows® 7 operating systems. To optimize WAN bandwidth, BranchCache copies content from your main office content servers and caches the content at branch office locations, allowing client computers at branch offices to access the content locally rather than over the WAN. This step-by-step guide provides instructions on how to deploy BranchCache in distributed cache mode in a test lab environment. To perform the steps in this guide, you need one computer that is running Windows Server 2008 R2 and three computers that are running either Windows® 7 Enterprise or Windows® 7 Ultimate. Read more: MS Download