单项选择题 Your company has Windows Server 2008 R2 file servers.   You need to recommend a data recovery strategy that meets the following requirements：   èBackups must have a minimal impact on performance.   èAll data volumes on the file server must be backed up daily.   èIf a disk fails， the recovery strategy must allow individual files to be restored.   èUsers must be able to retrieve previous versions of files without the intervention of an administrator.   What should you recommend？（）

单项选择题 Your network consists of a single Active Directory domain. The domain controllers run Windows   Server 2008 R2. Your company¯s enterprisesecurity policy states that the domain controllers cannot contain optical drives. ou need to recommend a backup and recovery plan that restores the domain controllers in the event of a  catastrophic server failure. What should you recommend？（）

单项选择题 Your company has several branch offices. Your network consists of a single Active Directory domain.   Each branch office contains domain controllers and member servers. The domain controllers run  Windows Server 2003 SP2. The member servers run Windows Server 2008 R2.  Physical security of the servers at the branch offices is a concern.   You plan to implement Windows BitLocker Drive Encryption （BitLocker） on the member servers.  You need to ensure that you can access the BitLocker volume if the BitLocker keys are corruptedon the member servers. The recovery information must be stored in a central location. What should you do？（）