单项选择题 Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 （SP2）. You have two DNS servers named Server1 and Server2.  Server1 hosts an Active Directory-integrated zone for contoso.com. Server2 hosts a secondary zone for contoso.com. The serial number for the contoso.com zone is currently 985413. You need to verify whether Server2 has the most up-to-date version of the zone.  What should you do？（）

单项选择题 Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 （SP2）.You have two DNS servers named Server1 and Server2. Server1 hosts the primary zone for contoso.com.  Server2 hosts the secondary zone for contoso.com. You need to ensure that when records are updated on Server1， the records are replicated to Server2 in the shortest time possible.  What should you do？（）

单项选择题 Your network consists of a single Active Directory domain. You have a Web server named server1.contoso.com that runs Windows Server 2003 Service Pack 2 （SP2）. Users access a Web site on Server1 by using the URL http：//server1.contoso.com.  Users also access the Web site on Server1 by using the URL http：//192.168.1.10. You need to configure DNS to enable users to access the Web site by using the URL http：//www.contoso.com. The solution must prevent the need to manually update DNS if the IP address of Server1 changes. Which type of resource record should you create in DNS？（）