BranchCache, an exciting feature introduced in Windows 7 and Windows Server 2008 R2, enables content from file and Web servers on a wide area network (WAN) to be cached on computers at a local branch office. Once BranchCache is configured, a copy of data accessed from intranet Web and file servers is cached locally within the branch office. Cached content can either be distributed across peer client computers (Distributed Cache mode) or centrally hosted on a server (Hosted Cache mode). When another client on the same network requests the file, the client downloads it from the local cache without downloading the same content across the WAN. BranchCache is to improve application response time and reduce WAN traffic.