单项选择题 Your network contains an 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.You need to ensure that DNS zone data is encrypted when the data replicates across the network. DC2 must provide authoritative responses to client computers.What should you do？（）

单项选择题 Your company has active directory certificate services (AD CS) and network access protection (NAP) deployed on the network. You need to configure the wireless network to accept smart cards. What should you do?（）

单项选择题 You deploy a windows server 2008 VPN server behind a firewall. Remote uses connect to the VPN by using portable computers that run windows vista with the latest service pack. The firewall is configured to allows only secured web communications. You need to enable remote users to connect as securely as possible. You must achieve this goal without opening any additional ports on the firewall. What should you do?（）