单项选择题 You work as the IT professional in an international company which is named wiikigo. You are experienced in implementing and administering a network operating system. You are specialized in configuring IP addressing and services, configuring name resolution and network access and so on. You are in charge of a domain controller that runs windows server 2008 and the DNS server role. The dns server hosts an active directory-integrated zone for your domain. You need to provide a user with the ability to manage records in the zone. But the user must not so what action should you perform?（）

单项选择题 Your company has an active directory domain. A server named server1 runs the network access policy server role. You need to disable IPv6 for all connections except for the tunnel interface and the IPv6 loopback interface. What should you do?（）

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？（）