单项选择题
A. Run the netsh ras ipv6 set command
B. Run the netsh interface ipv6 delete command
C. Run ipv6.exe and remove the IPv6 protocol
D. From the Local Area connection Properties， uncheck Internet Protocol Versions 6 （TCP/IPv6）
单项选择题 Your company has a single Active Directory forest that has an Active Directory domain named na.contoso.com. A server named Server1 runs the DNS Server server role.You notice stale resource records in the na.contoso.com zone. You have enabled DNS scavenging on Server1. Three weeks later, you notice that the stale resource records remain in na.contoso.com.You need to ensure that the stale resource records are removed from na.contoso.com.What should you do？（）
单项选择题 Contoso Ltd. has a single Active Directory forest that has five domains. Each domain has two DNS servers.Each DNS server hosts Active Directory-integrated zones for all five domains. All domain controllers run Windows Server 2008 R2.Contoso acquires a company named Tailspin Toys. Tailspin Toys has a single Active Directory forest that contains a single domain.You need to configure the DNS system in the Contoso forest to provide name resolution for resources in both forests.What should you do？（）
单项选择题 YourcompanyhasdeployedNetworkAccessProtection（NAP）.Youconfiguresecurewirelessaccesstothenetworkbyusing802.1Xauthenticationfromanyaccesspoint.YouneedtoensurethatallclientcomputersthataccessthenetworkareevaluatedbyNAP.Whatshouldyoudo？（）