单项选择题 Your company has a single Active Directory forest that has a domain in North America named na.contoso.com and a domain in South America named sa.contoso.com. The client computers run Windows 7. You need to configure the client computers in the North America office to improve the name resolution response time for resources in the South America office. What should you do？（）

单项选择题 Your company has an Active Directory domain named ad.contoso.com. All client computers run Windows 7. The company has recently acquired a company that has an Active Directory domain named ad.fabrikam.com. A two-way forest trust is established between the ad.fabrikam.com domain and the ad.contoso.com domain. You need to edit the ad.contoso.com domain Group Policy object (GPO) to enable users in the ad.contoso.com domain to access resources in the ad.fabrikam.com domain. What should you do？（）

单项选择题 Your company has a server named Server1 that runs Windows Server 2008 R2. Server1 runs the DHCP Server server role and the DNS Server server role. You also have a server named ServerCore that runs a Server Core installation of Windows Server 2008 R2. All computers are configured to use only Server1 for DNS resolution. The IP address of Server1 is 192.168.0.1. The network interface on all the computers is named LAN. Server1 is temporarily offline. A new DNS server named Server2 has been configured to use the IP address 192.168.0.254.You need to configure ServerCore to use Server2 as the preferred DNS server and Server1 as the alternate DNS server. What should you do？（）