Objective 4.1 Questions

1.	Which of the following name resolution methods is the default name resolution method used on the Internet and on Windows Server 2003–based networks? Domain Name System Windows Internet Naming Service HOSTS files LMHOSTS files
2.	Which of the following commands can you use to determine the IP addresses of the DNS servers configured for a computer running Windows XP? ipconfig ipconfig /all ipconfig /dns ipconfig /servers
3.	You are troubleshooting a connectivity problem on the network of a small business. The business has eight computers that are connected together through a combination Ethernet router and switch, which also acts as a Dynamic Host Configuration Protocol (DHCP) server and provides access to the Internet. Each computer is connected directly to the Internet through the router, and all computers should retrieve all TCP/IP addressing information automatically. One of the users complains that although he can access other computers on the network, he cannot access any Internet websites or retrieve e-mail from an Internet server. The other computers on the network can access Internet websites and retrieve e-mail. You verify that the computer in question does not reach any websites when you type in the URL. However, you can get to websites when you type in the actual IP address. Also, you can successfully retrieve e-mail from the mail server if you configure Outlook Express to use the IP address of the mail server instead of its name. You use the ipconfig /all command on each computer and determine that the computer that cannot access websites has different DNS servers listed than the other computers. What is the likely problem? The computer should be configured to obtain DNS server addresses automatically. The DNS service is not installed on the computer. The computer should be configured to run Internet Connection Sharing (ICS). The computer should be configured to use WINS.

Answers

1.	Correct Answers: A Correct DNS is the most widely used name resolution method for the TCP/IP protocol. DNS is used on the Internet and on Windows Server 2003–based networks. Incorrect WINS is supported only on Windows-based networks. It has been supplanted by DNS as the default name resolution mechanism on modern Windows networks. Incorrect HOSTS files are local text files that map host names and FQDNs to IP addresses. Incorrect LMHOSTS files are text files located on the local computer that map NetBIOS names to their IP addresses for hosts that are not located on a local subnet.
2.	Correct Answers: B Incorrect Typing ipconfig at the command prompt displays basic TCP/IP information that shows the IP address, subnet mask, and default gateway for each connection. However, it does not display DNS server information. Correct Typing ipconfig /all at the command prompt displays detailed TCP/IP information, including the DNS servers configured for all connections. Incorrect There is no /dns switch available for the ipconfig command. Incorrect There is no /servers switch available for the ipconfig command.
3.	Correct Answers: A Correct Because the router is acting as a DHCP server, computers should be configured to obtain IP addressing information and DNS server information automatically. Incorrect The DNS service is installed automatically on computers running Windows XP. The problem at hand does not suggest a problem with the DNS service itself. Incorrect Internet Connection Sharing is a service that allows one computer to share its Internet connection with other computers on a network. Because all computers connect to the Internet directly through a router, ICS should not be used. Incorrect WINS is not used for Internet name resolution.