ou are the network administrator for your company. The network consists of a single Active Directory forest that contains one domain. The functional level of the forest is Windows 2000， and the functional level of the domain is Windows 2000 mixed. The domain contains four domain controllers named DC1， DC2， DC3， and DC4. There are two sites in the forest. DC1 and DC2 are in one site. DC3 and DC4 are in the other site. DC1 fails. You need to wait until the following week to restore DC1. While connected to DC3， you perform a bulk import of user accounts and receive an error message stating that a number of the user accounts could not be created. You need to ensure that the user accounts can be created. 
What should you do？（）

You are the network administrator for Contoso Pharmaceuticals. Your network consists of a single Active Directory forest that contains three domains. The forest root domain is named contoso.com. The domain contains two child domains named usa.contoso.com and europe.contoso.com. The functional level of the forest is Windows Server 2003. Each domain contains two Windows Server 2003 domain controllers named DC1 and DC2. DC1 in the contoso.com domain performs the following two operations master roles: schema master and domain naming master. DC1 in each child domain performs the following three operations master roles: PDC emulator master, relative ID (RID) master, and infrastructure master. DC1 in each domain is also a global catalog server. The user account for Nancy Buchanan in the europe.contoso.com domain is a member of the Medicine Students security group. Because of a name change, the domain administrator of europe.contoso.com changes the Last name field of Nancy's useraccount from Buchanan to Anderson. The domain administrator of usa.contoso.com discovers that the user account for Nancy is still listed as Nancy Buchanan.  You need to ensure that the user account for Nancy Anderson is correctly listed in the Medicine Students group. 
What should you do?（） 

You are the network administrator for Alpine Ski House. The network consists of a single Active Directory forest that contains five domains. The functional level of the forest is Windows 2000. You have not configured any universal groups in the forest. One domain is a child domain named  child1.alpineskihouse.com  that contains two domain controllers and 50 client computers. The functional level of the domain is Windows Server 2003. The network includes an Active Directory site named Site1 that contains two domain controllers. Site1 represents a remote clinic, and the location changes every few months. All of the computers in child1.alpineskihouse.com are located in the remote clinic. The single WAN connection that connects the remote clinic to the main network is often saturated or unavailable. Site1 does not include any global catalog servers. You create several new user accounts on the domain controllers located in Site1. You need to ensure that users in the remote clinic can always quickly and successfully log on to the domain. 
What should you do?（）

You are the network administrator for Adventure Works. The network consists of a single Active Directory forest that contains a forest root domain named adventure­works.com and a child domain named child1.adventure­works.com. The functional level of the forest is Windows Server 2003.The company uses universal groups to prevent temporary employees from accessing confidential information on computers in the forest. The child1.adventure­works.com domain contains a Windows 2000 Server computer named Server1. Server1 runs an application that makes frequent LDAP queries to the global catalog. Server1 is located on a subnet associated with an Active Directory site named Site2 that has no global catalog servers. Site2 is connected to another site by a WAN connection. You need to enable the application on Server1 to run at high performance levels and to continue operating if a WAN connection fails. You also need to minimize traffic over the WAN connection. 
What should you do？（）