单项选择题 Your network contains an Active Directory domain named contoso.com.   You create a GlobalNames zone. You add an alias （CNAME） resource record named Server1 to the zone.   The target host of the record is server2.contoso.com.   When you ping Server1， you discover that the name fails to resolve.  You successfully resolve server2.contoso.com.   You need to ensure that you can resolve names by using the GlobalNames zone.  What should you do（）

单项选择题 Your network contains an Active Directory domain named contoso.com. The domain contains a domain controller named DC1. DC1 hosts a standard primary zone for contoso.com.   You discover that non-domain member computers register records in the contoso.com zone.   You need to prevent the non-domain member computers from registering records in the contoso.com   zone. All domain member computers must be allowed to register records in the contoso.com zone.  What should you do first（）

单项选择题 Your network contains an Active Directory forest named contoso.com.   You plan to add a new domain named nwtraders.com to the forest.  All DNS servers are domain controllers.   You need to ensure that the computers in nwtraders.com can update their Host （A） records on any of the  DNS servers in the forest.   What should you do（）