You have an Exchange Server 2010 organization. 
The organization contains two servers named Server1 and Server2. 
Server1 and Server2 have the Mailbox server role and the Hub Transport server role installed. Server 1 and Server2 are members of a database availability group （DAG）. 
You need to plan the deployment of Client Access servers to meet the following requirements： .Users must be able to access their mailboxes if a single server fails .Users must not attempt to connect to a failed server 
What should you include in your plan？（）

单项选择题You deploy multiple Mailbox servers.  Each Mailbox server contains a copy of a mailbox database named DB1.  You need to recommend a solution that allows administrators to remove corrupt messages that have been replicated before the corrupt messages are applied to each copy of DB1. What should you recommend？（）

A.Modify log truncation.
B.Enable circular logging.
C.Implement lagged copies.
D.Configure shadow redundancy.

单项选择题You have an Exchange Server 2010 organization.  The network contains two Mailbox servers that are configured in a database availability group （DAG）. You plan to implement a disaster recovery solution.  You need to recommend a solution that ensures that the active mailbox database copy is unaffected bythe backup process.  You want to achieve this goal while minimizing costs.  What should you recommend？（）

A.Windows Server Backup
B.Network Attached Storage （NAS） snapshots
C.Microsoft System Center Configuration Manager
D.Microsoft System Center Data Protection Manager

单项选择题Your company has a main office and 10 branch offices. Each office connects to the Internet by using a direct link.  The main office connects to the branch offices by using a WAN link. You plan to deploy Exchange Server 2010 servers in each office.  You need to design Active Directory to meet the following Exchange Server 2010 requirements： .Users must be able to access their mailboxes if a single domain controller fails  .Users must be able to send e-mail messages to the Internet if a WAN link fails  What should you include in the design？（）

A.Create an Active Directory site for each office. Deploy two global catalog servers in each site.
B.Create an Active Directory site for each office. Deploy a single domain controller in each site，and then enable site link bridging.
C.Create an Active Directory site for all of the offices. Deploy a global catalog server and a read-only domain controller in each site.
D.Create an Active Directory site for all of the offices. Deploy a global catalog server and two read- only global catalog servers in each Active Directory site.

单项选择题You have an Active Directory forest. You plan to deploy an Exchange Server 2010 organization that contains the following servers：.Two Edge Transport servers.Two Hub Transport servers You need to recommend changes to the organization to ensure that e-mail messages can be sent to the Internet if a single transport server fails.  What should you recommend？（）

A.Configure shadow redundancy for the Hub Transport servers.
B.Implement failover clustering on both Hub Transport servers.
C.Configure both Edge Transport servers as source servers for a Send connector.
D.Create one mail exchange （MX） record and one SRV record for each Edge Transport server on the internal DNS zone.

单项选择题Your company has an Exchange 2010 organization that contains multiple Hub Transport servers. You have a line-of-business application that relays e-mail messages by using a Hub Transport servernamed Hub1.  The application only supports sending e-mail to a single SMTP server.  You need to ensure that the application can relay e-mail messages if Hub1 fails.  What should you do？（）

A.Implement log truncation
B.Install and configure failover clustering on the Hub Transport servers.
C.Implement Windows network load balancing on the Hub Transport servers.
D.Create multiple MX records for the Hub Transport servers in the internal DNS zone.