Objective 5.2: Troubleshoot Name Resolution Issues | MCDST Self-Paced Training Exam 70-271(c) Supporting Users and Troubleshooting a Micro[... ]ystem

Because IP addresses can be difficult to remember, services are available to make it easier for us humans. Name resolution services, such as WINS and DNS, enable us to connect to a network resource by using simple names. As a DST, you should be able to recognize whether a connectivity problem is because of an incorrectly configured IP address, subnet mask, or default gateway or if the problem is a name resolution issue.

To answer the questions in this objective, you should know how to troubleshoot name resolution issues on a client’s workstation and understand how DNS and HOSTS files resolve host name resolution. You should also understand how WINS and LMHOSTS files resolve NetBIOS names and how a workstation running Windows XP uses these services and files.

Objective 5.2 Questions

You are a DST for a large insurance company that supports more than 100 workstations running Windows XP Professional. On Monday morning, you receive over 30 telephone calls from users saying that they cannot connect to the Internet. From your office, you enter your company’s Uniform Resource Locator (URL) from your browser and receive an error. You then enter the IP address of your company in the browser screen and are able to connect without a problem. You attempt to connect to several remote Web sites by using IP addresses and connect without any errors. What might you try to do next? (Choose the best answer.)
1. Ping the DHCP server.
2. Ping 127.0.0.1.
3. Ping the default gateway.
4. You should ping the DNS server.
You are a DST for a small dairy farm and support 10 users running Windows XP Professional. One of the users wants to know whether a WINS server or LMHOSTS files are needed on her small nonrouted network. What should you tell her?
1. Tell her that neither a WINS server nor an LMHOSTS file is necessary.
2. Tell her that WINS wasn’t needed but that she should create LMHOSTS files on each workstation.
3. Tell her that WINS should be configured in Single Mode and that LMHOSTS files do not need to be created.
4. Tell the user that WINS is mandatory for Windows XP networks but that LMHOSTS files are optional.
You are a DST for a large furniture outlet and support two workstations running Windows XP Professional. The network administrator informs you that the company will no longer use DHCP for TCP/IP configuration and that all workstations will now use static configuration. You have just configured one of the workstations with an IP address, a subnet mask, and a default gateway. How do you configure the workstation to use the WINS server that is available to the users?
1. From the General tab, select the Other Parameters button, and use the WINS/DNS wizard.
2. From the General tab, select the WINS Configuration check box.
3. Click Advanced on the General tab of the Internet Protocol (TCP/IP) Properties dialog box, and then select the WINS tab.
4. From the Options dialog box, select WINS under Optional Settings.
Which of the following can be used for name resolution? (Choose all that apply.)
1. WINS
2. DNS
3. HOSTS file
4. LMHOSTS file
You are a DST for a large real estate company that has 80 workstations running Windows XP Professional. The company is using DHCP to issue TCP/IP configuration information to all the users. Today the administrator moved DNS to a different server, and she added a second router to the network. No one in the company is able to connect to any remote hosts by using the host name, but all of the workstations can connect by using the remote workstation’s IP address. What is causing the problem?
1. The administrator forgot to change the default gateway address after adding a new router.
2. DNS server IP address is not updated to all DHCP client workstations
3. The second router should be configured in the Alternate IP Address dialog box.
4. DNS is configured with no LMHOSTS lookup.

Objective 5.2 Answers

Correct Answers: D
1. Incorrect: The fact that your workstation was able to connect to the Web server by using an IP address shows you that your IP configuration was fine. This problem seems more like a name resolution issue. You should try to ping the DNS server to see whether it is available. DNS is used to resolve host names to IP addresses.
2. Incorrect: Because you are able to connect to a host by using an IP address, your TCP/IP configuration is fine. You should try to ping the DNS server because the problem seems to be a name resolution one.
3. Incorrect: Because you are able to connect to local and remote sites by using IP addresses, the default gateway is correctly configured. You should ping the DNS server because it is responsible for name resolution and determine whether it is available to the users.
4. Correct: You should ping the DNS server because it is responsible for name resolution and determine whether it is available to the users.
Correct Answers: A
1. Correct: There is no reason to configure a WINS server or create LMHOSTS files for each workstation in this scenario because the workstations can discover each other through broadcast traffic. Since there are only 10 workstations on the network segment, there will not be excessive broadcast traffic.
2. Incorrect: There is no reason to configure a WINS server or to create LMHOSTS files for each workstation in this scenario because the workstations can discover each other through broadcast traffic.
3. Incorrect: There is no such thing as Single Mode with regard to WINS. In a small nonrouted network, there is no need for either WINS or LMHOSTS files.
4. Incorrect: Both WINS and LMHOSTS are optional in networks running Windows XP Professional. Because her network contains only 10 workstations and is a nonrouted network, there is no need for either.
Correct Answers: C
1. Incorrect: There are no such options, and there is no such wizard. To configure a workstation’s WINS options, click Advanced in the General tab of the Internet Protocol (TCP/IP) Properties dialog box, and then select the WINS tab.
2. Incorrect: There is no such check box. To configure a workstation’s WINS options, click Advanced on the General tab of the Internet Protocol (TCP/IP) Properties dialog box, and then select the WINS tab.
3. Correct: The WINS tab allows you to enter WINS addresses in the order you choose and allows you to choose whether to enable LMHOSTS lookup and NetBIOS over TCP/IP.
4. Incorrect: The WINS tab allows you to enter WINS addresses in the order you choose and allows you to choose whether to enable LMHOSTS lookup and NetBIOS over TCP/IP.
Correct Answers: A, B, C, and D
1. Correct: A WINS server is used to resolve NetBIOS names to IP addresses.
2. Correct: Domain Name System (DNS) is used to resolve host names to IP addresses.
3. Correct: A HOSTS file is a text file that is stored on the workstation. It contains host names mapped to IP addresses.
4. Correct: A LMHOSTS file is similar to a HOSTS file. It too is a text file, but it contains NetBIOS names mapped to IP addresses.
Correct Answers: B
1. Incorrect: This is not a routing problem because we are able to connect to remote hosts by using IP addresses. It is a name resolution issue. The users are most likely using the IP address for the old DNS server. They should execute the ipconfig /release command followed by the ipconfig /renew command at their workstations to update their TCP/IP configuration to point to the correct DNS server.
2. Correct: This is a name resolution issue. The users are most likely using the IP address for the old DNS server. They should execute the ipconfig /release command followed by the ipconfig /renew command at their workstations to update their TCP/IP configuration to point to the correct DNS server.
3. Incorrect: This is not a routing problem because we are able to connect to remote hosts by using IP addresses. It is a name resolution issue. The users are most likely using the IP address for the old DNS server. They should execute the ipconfig /release command followed by the ipconfig /renew command at their workstations to update their TCP/IP configuration to point to the correct DNS server.
4. Incorrect: LMHOSTS lookup is set in WINS, not DNS. In this scenario, the users are most likely using the IP address for the old DNS server. They should execute the ipconfig /release command followed by the ipconfig /renew command at their workstations to update their TCP/IP configuration to point to the correct DNS server.