Your company has a single Active Directory forest that has six domains. All DNS servers in the forest run Windows Server 2008. You need to ensure that all public DNS quieries are channeled through a singlecahing- only DNS server. Which two actions should you perform？（） 

A. Configure all access points to use 802.1X authentication.
B. Configure all portable computers to use MS-CHAP v2 authentication.
C. Use the Group Policy Management Console to access the wireless Group Policy settings, and enable the Prevent connections to ad-hoc networks option.
D. Use the Group Policy Management Console to access the wireless Group Policy settings, and disable the Prevent connections to infrastructure networks option.

A. Configure all access points as RADIUS clients to the Remediation Servers.
B. Configure all access points as RADIUS clients to the Network Policy Server (NPS).
C. Create a Network Policy that defines Remote Access Server as a network connection method.
D. Create a Network Policy that specifies EAP-TLS as the only available authentication method.

A. Create a Group Policy object (GPO) that enables Security Center and link the policy to the domain.
B. Create a Group Policy object (GPO) that enables Security Center and link the policy to the Domain Controllers organizational unit (OU).
C. Create a Group Policy object (GPO) and set the Require trusted path for credential entry option to Enabled. Link the policy to the domain.
D. Create a Group Policy object (GPO) and set the Require trusted path for credential entry option to Enabled. Link the policy to the Domain Controllers organizational unit (OU).