You administer your company network. All servers on the network run Windows Server 2003, and all client computers run Windows XP Professional or Windows 2000 Professional. You add a DNS server to the network and then configure the networks DHCP server to automatically provide the IP address of the new DNS server to all of the DHCP client computers. You ask all of the network users to verify that the DHCP server has updated their computers TCP/IP configurations to reflect the new DNS servers IP address. Which command should users type at a command prompt?
A. Ipconfig /all B. Dnslint C. Dnscmd D. Netstat -a
Ipconfig /all-explanation: users should type ipconfig /all at the command prompt to display a computers tcp/ip configuration information. the ipconfig command displays information such as the ip address, subnet mask and default gateway of the network adapters that are installed. when the /all switch is used, more detailed tcp/ip configuration information is displayed, including the computers host name, the primary dns suffix, the node type, and whether a computer receives ip address configurations from a dhcp server. if a computer is configured to use dns and wins servers, then the ip addresses of those servers are also displayed. the dnslint command can be used to troubleshoot dns name resolution problems by verifying the existence of specified dns records, by diagnosing delegation issues, and by verifying active directory replication functionality. the dnscmd command can be used to configure and manage dns servers from a command prompt. for example, the dnscmd servername /enumzones command can be used to display the list of all zones that are hosted on a specified dns server. the netstat command can be used to view tcp/ip statistics; the -a switch can be used to determine the open ports on a computer.