单项选择题 Your network contains a single Active Directory forest. The forest contains two domains named  contoso.com and sales.contoso.com. The domain controllers are configured as shown in the  following table：     Server name  Domain   DNS zones hosted   DC1  contoso.com  contoso.com   DC2  contoso.com  contoso.com   DC3  sales.contoso.com  sales.contoso.com   DC4  sales.contoso.com  sales.contoso.com   All domain controllers run Windows Server 2008 R2. All zones are configured as Active Directory-   integrated zones.   You need to ensure that contoso.com records are available on DC3.     Which command should you run（）

单项选择题 Your network contains an Active Directory forest. The forest contains one domain and three sites.  Each site contains two domain controllers. All domain controllers are DNS servers.     You create a new Active Directory-integrated zone.     You need to ensure that the new zone is replicated to the domain controllers in only one of the  sites.   What should you do first（）

单项选择题 Your network contains an Active Directory domain named contoso.com. The contoso.com DNS  zone is stored in Active Directory. All domain controllers run Windows Server 2008 R2.     You need to identify if all of the DNS records used for Active Directory replication are correctly  registered.     What should you do（）