单项选择题
A.Create a DNS forwarder.
B.Create a DNS delegation.
C.Configure root hint servers.
D.Configure an alternate DNS server on all client computers.
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（）
单项选择题 YouhaveanActiveDirectorydomainnamedcontoso.com.YouhaveadomaincontrollernamedServer1thatisconfiguredasaDNSserver.Server1hostsastandardprimaryzoneforcontoso.com.TheDNSconfigurationofServer1isshownintheexhibit.（ClicktheExhibitbutton.） Youdiscoverthatstaleresourcerecordsarenotautomaticallyremovedfromthecontoso.comzone.Youneedtoensurethatthestaleresourcerecordsareautomaticallyremovedfromthecontoso.comzone. Whatshouldyoudo（）