单项选择题
A. Stop and restart the DNS Server service on Server1.
B. Enable DNS scavenging on the na.contoso.com zone.
C. Run the dnscmd Server1 /AgeAllRecords command on Server1.
D. Run the dnscmd Server1 /StartScavenging command on Server1.
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？（）
多项选择题 Your company has a single Active Directory forest that has six domains. All DNS servers in the forest run Windows Server 2008 R2.You need to ensure that all public DNS queries are channeled through a single-caching-only DNS server. Which two actions should you perform？（）
多项选择题 Your company uses Active Directory-integrated DNS. Users require access to the Internet. You run a network capture. You notice the DNS server is sending DNS name resolution queries to a server named f.root-servers.net. You need to prevent the DNS server from sending queries to f.root-servers.net. The server must be able to resolve names for Internet hosts. Which two actions should you perform？（）