单项选择题
A.Stop and restart the DNS service on server1.
B.Enable DNS scavenging on the na.contoso.com zone.
C.Run the dnscmd server1 /ageallrecords command on server1/.
D.Run the dnscmd server1 /startscavenging command on server1.
单项选择题 Your network contains a single Active Directory domain. All servers run Windows Server 2008 R2.You have an IPv6-only infrastructure that has multiple subnets. You deploy a new server named Server1.You need to ensure that Server1 can communicate with the client computers in all of the internal subnets.The solution must use an address that is reserved for internal networks.Which address should you assign？（）
单项选择题 Your network contains a computer named Computer1. Computer1 is assigned an IP address of 39 / 84 192.168.1.112/26.Your companys corporate policy states that the first usable address in each subnet is allocated to the default gateway.You need to configure the default gateway for Computer1.Which address should you choose？（）
单项选择题 Your company has a branch office that contains 1,000 computers.You need to select a network address that supports 1,000 computers in the same subnet. The solution must minimize the number of unused addresses in the subnet.Which address range should you configure？（）