多项选择题
A.From Server1， run djoin.exe.
B.From Server1， run netdom.exe.
C.From a Windows 7 computer， run djoin.exe.
D.Upgrade one domain controller to Windows Server 2008 R2.
E.Raise the functional level of the domain to Windows Server 2008.
单项选择题 Your company has a main office and a branch office. The network contains a single Active Directory domain. The main office contains a domain controller named DC1. You need to install a domain controller in the branch office by using an offline copy of the Active Directory database. What should you do first（）
单项选择题 You have an enterprise root certification authority （CA） that runs Windows Server 2008 R2. You need to ensure that you can recover the private key of a certificate issued to a Web server. What should you do（）
单项选择题 You need to back up all of the group policies in a domain. The solution must minimize the size of the backup. What should you use（）