Your network contains three Active Directory sites name……

单项选择题You have a Microsoft Internet Security and Accelerator （ISA） 2006 server that provides all Internet accessfor your company.  You have two Mailbox servers configured in a database availability group （DAG）， two Client Accessservers， and two Hub Transport servers.  You need to recommend changes to the environment to ensure that users can access Outlook Web App（OWA） from the Internet if any single server fails.  What should you recommend？（）

A.Configure a Client Access server array.
B.Deploy a second ISA server and create an ISA server array.
C.Implement Windows Network Load Balancing for the Client Access servers.
D.Deploy two Edge Transport servers that are configured to use EdgeSync synchronization.

单项选择题Your company has an Active Directory forest.  The network contains Exchange Server 2007 Service Pack 1 （SP1） and Exchange Server 2003 ServicePack 2 （SP2） servers.  All domain controllers run Windows Server 2003 （x86） Service Pack 1 （SP1）. You plan to deploy Exchange Server 2010 on the network.  You need to recommend changes to the servers so that you can deploy Exchange Server 2010 servers.  What should you upgrade first？（）

A.all domain controllers to Windows Server 2003 （x64） SP2
B.all domain controllers to Windows Server 2008 （x86）
C.all Exchange Server 2003 servers to Exchange Server 2007 SP2
D.all Exchange Server 2007 SP1 servers to Exchange Server 2007 SP2

单项选择题Your network contains an internal network and a perimeter network. The internal network contains an Active Directory forest. The forest contains a single domain.  You plan to deploy 10 Edge Transport servers on the perimeter network.  You need to recommend a solution for the Edge Transport server deployment. The solution must meet the following requirements： .Allow administrators to apply a single security policy to all Edge Transport servers .Reduce the administrative overhead that is required to manage servers .Minimize the attack surface of the internal network  What should you recommend？（）

A.Implement Network Policy and Access Services （NPAS）.
B.Implement Active Directory Federation Services （AD FS）.
C.Create a new Active Directory domain in the internal forest， and then join all Edge Transport servers to the new domain.
D.Create an Active Directory forest in the perimeter network， and then join all Edge Transport servers to the new domain.

单项选择题You have an Exchange Server 2010 organization.  An Edge Transport server sends and receives all e- mail messages from the Internet.  You notice that some servers on the Internet identify e-mail messages from your organization as spam. You need to minimize the possibility that e-mail messages sent from your organization are identified asspam.  What should you do？（）

A.Implement Microsoft Forefront Security for Exchange Server.
B.Create SenderID TXT records for the Edge Transport servers.
C.Configure the Edge Transport servers to use a real-time block list （RBL）.
D.Install a server certificate from a trusted third-party certification authority （CA）.

单项选择题You have an Exchange Server 2010 organization. You plan to deploy two new Mailbox servers.  Both Mailbox servers will be members of a database availability group （DAG）. You need to recommend a hard-disk configuration for the new servers. Your recommendation must meet the following requirements：.Maximize write performance .Prevent a switchover if a single disk fails Which disk configuration should you recommend？（）

A.RAID 0 array
B.RAID 1 array
C.RAID 5 array
D.RAID 10 array