单项选择题
A.On Server1， add a conditional forwarder.
B.On DC1， modify the permissions of contoso.com zone.
C.On DC1， modify the zone transfer settings for the contoso.com zone.
D.Add the Server1 computer account to the DNSUpdateProxy group.
单项选择题 Your network consists of an Active Directory forest that contains one domain. All domain controllers run Windows Server 2008 R2 and are configured as DNS servers. You have an Active Directory-integrated zone. You have two Active Directory sites. Each site contains five domain controllers. You add a new NS record to the zone. You need to ensure that all domain controllers immediately receive the new NS record. What should you do（）
多项选择题 Your company has an Active Directory domain named ad.contoso.com. The domain has two domain controllers named DC1 and DC2. Both domain controllers have the DNS Server server role installed. You install a new DNS server named DNS1.contoso.com on the perimeter network. You configure DC1 to forward all unresolved name requests to DNS1.contoso.com. You discover that the DNS forwarding option is unavailable on DC2. You need to configure DNS forwarding on the DC2 server to point to the DNS1.contoso.com server. Which two actions should you perform（）
单项选择题 Contoso, Ltd. has an Active Directory domain named ad.contoso.com. Fabrikam, Inc. has an Active Directory domain named intranet.fabrikam.com. Fabrikams security policy prohibits the transfer of internal DNS zone data outside the Fabrikam network. You need to ensure that the Contoso users are able to resolve names from the intranet.fabrikam.com domain. What should you do（）