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单项选择题 You have an Exchange Server 2010 organization.  You need to recommend a client access solution that meets the following requirements： .Reduces the time required for users to reconnect to user mailboxes if a single Client Access server fails.Prevents users from being prompted for authentication if a single Client Access server fails What should you recommend？（）

A、Client Access server array and hardware load-balancer

B、database availability group （DAG） and hardware load-balancer

C、failover clustering and database availability group （DAG）

D、Windows Network Load Balancing and failover clustering

  • A

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