单项选择题
A.the root hints of the DNS server
B.the security settings of the zone
C.the Windows Firewall settings on the DNS server
D.the zone transfer settings of the zone
单项选择题 Your network contains a single Active Directory domain named contoso.com. The domain contains two domain controllers named DC1 and DC2 that run Windows Server 2008 R2. DC1 hosts a primary zone for contoso.com. DC2 hosts a secondary zone for contosto.com. On DC1， you change the zone to an Active Directory-integrated zone and configure the zone to accept secure dynamic updates only. You need to ensure that DC2 can accept secure dynamic updates to the contoso.com zone. Which command should you run（）
单项选择题 Your network contains an Active Directory domain named contoso.com. You plan to deploy a child domain named sales.contoso.com. The domain controllers in sales.contoso.com will be DNS servers for sales.contoso.com. You need to ensure that users in contoso.com can connect to servers in sales.contoso.com by using fully qualified domain names （FQDNs）. What should you do（）
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（）