Your company has a main office and five branch offices. The branch offices connect to the main office by using a WAN link.
Each branch office has 100 client computers that run Windows XP or Windows Vista. All servers run Windows Server 2008 R2.
The main office has a Windows Server Update Services (WSUS) server.
You need to minimize the amount of WAN traffic used to download updates from the WSUS server.
What should you do?
A.
From Windows Explorer, enable Offline Files.
B.
From a Group Policy, enable Allow BITS Peercaching.
C.
From a Group Policy, enable the Set BranchCache Hosted Cache mode setting.
D.
From a Group Policy, enable the Set BranchCache Distributed Cache mode setting.
Reference for this answer… B is right!.
http://technet.microsoft.com/en-us/library/cc720428(WS.10).aspx
BITS Peercaching is a feature of BITS3.0 (limited support) in Windows Vista and developed in BITS4.0 – Windows 7.
Windows XP clients won’t benefit at all from BranchCache.
B is still correct answer but you have to be aware of that.
B is anwer of the question .