单项选择题 You work as the enterprise exchange administrator at TestKing.com. TestKing.com makes use of Microsoft Exchange Server messaging solution. The TestKing.com network consists of a single ActiveDirectory domain named testking.com. You have received instructions from the CIO to install Exchange Server 2010 that has the followingservers： * Two Edge Transport servers named TESTKING-SR24 and TESTKING-SR25 * Two Hub Transport servers namend TESTKING-SR26 and TESTKING-SR27 However， e-mail massages from the Internet should be delivered to internal recipients， in the case of a single Edge Transport failure. What should you do？（）

单项选择题 You work as the enterprise exchange administrator at TestKing.com. TestKing.com makes use of Microsoft Exchange Server messaging solution. TestKing.com has its headquarters in Chicago and branchoffices around the globe. All the offices of Testking.com have a direct link to the Internet. The Chicago office connects to the other offices via a WAN link. You have received instructions from theCIO to install Exchange Server 2010 servers in every office. You need to ensure that your design maintainuser access mailboxes in the event of a domain controller failure as well as ensuring that user is able tosend e-mail messages if a WAN link failure should occur. What should you do？（）

单项选择题 You work as the enterprise exchange administrator at TestKing.com. TestKing.com makes use of Microsoft Exchange Server messaging solution. The TestKing.com network consists of a single ActiveDirectory forest with one domain. The internal network of TestKing.com contains a perimeter network. You have received instructions fromthe CIO to install 15 Edge Transport servers on the perimeter network with the following criteria： * The Edge Transport servers should have a security policy， applied by the administrators. * The minimization of the administrative overhead towards the servers. * The minimization the attack surface of the perimeter network. What should you do？（）