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 main office and a branch office.The network contains two DNS servers named DNS1 and DNS2.DNS1 is located in the main office. DNS1 hosts a primary standard zone named contoso.com. The contoso.com zone is configured to use DNSSEC.DNS2 is located in the branch office. DNS2 is a caching-only DNS server. You need to ensure that client computers in the branch office can receive authoritative responses to queries for contoso.com if a WAN link fails. DNSSEC security must be maintained.What should you configure on DNS2 for contoso.com？（）
单项选择题 Your network contains a DNS server named Server1 that runs Windows Server 2008 R2. You need to ensure that client computers can resolve IPv6 addresses to fully qualified domain names(FQDNs). Which type of resource record should you create？（）
单项选择题 Your company has a single active directory forest that has a domain in north America named na.contoso.com and a domain in south America named sa.contoso.com. the client computers run windows vista. You need to configure the client computes in the America office to improve the name resolution response time for resources in the south America office what should you do?（）