单项选择题 our company has an Active Directory domain. The company has a main office and a branch office. Both the offices have domain controllers that run active directory-integrated DNS zones. All client computers are configured to use the local domain controllers for DNS resolution. The domain controllers at the branch office location are configured as read-only domain controllers (RODC). You change the IP address of an exisiting server named SRV2 in the main office. You need the branch office DNS servers to reflect the change immediately.What should you do?（）

单项选择题 Your network contains a server named Server1. Server1 is configured as a BranchCache server. The cache is located at D:\Branchcache.You need to remove all existing files and hashes from the cache.Which command should you run？（）

单项选择题 Your network contains an Active Directory domain named contoso.com. All servers run Windows Server 2008 R2. All client computers run Windows 7. You discover that users can use Encrypting File System (EFS) when the smart cards on their computers are removed.You need to prevent the users from accessing EFS-encrypted files when their smart cards are removed.From the EFS properties, you click Require a smart card for EFS.What should you do next？（）