单项选择题 Your network contains an Active Directory domain named contoso.com. You plan to deploy a  child domain named sales.contoso.com. The domain controllers in sales.contoso.com will be  DNS servers for sales.contoso.com.     You need to ensure that users in contoso.com can connect to servers in sales.contoso.com by  using fully qualified domain names （FQDNs）.     What should you do（）

单项选择题 You need to force a domain controller to register all service location （SRV） resource records in  DNS.     Which command should you run（）

单项选择题 Your network contains an Active Directory domain named contoso.com.     You remove several computers from the network.     You need to ensure that the host （A） records for the removed computers are automatically  deleted from the contoso.com DNS zone.     What should you do（）