The following activities provide practice with the topics introduced in this chapter.

Labs

Lab—Troubleshoot Using Network Utilities (20.3.12)

Packet Tracer Activities

Packet Tracer—Use the ipconfig Command (20.3.3)

Packet Tracer—Use the ping Command (20.3.6)

Packet Tracer—Troubleshoot a Wireless Connection (20.4.3)

Packet Tracer—Skills Integration Challenge (20.7.1)

Check Your Understanding Questions

Complete all the review questions listed here to test your understanding of the topics and concepts in this chapter. Appendix A, “Answers to the ‘Check Your Understanding‛ Questions,” lists the answers.

1. The home computer of a user is working properly. However, the user cannot access the Internet. The Internet connection is provided through a cable company. The user cannot identify the cause of the problem. Who should the user contact for further help?

1. The help line of the cable company
2. The support website of the computer vendor
3. The help line of the computer manufacturer
4. The operating system vendor

2. A network technician enters the ipconfig /release command followed by ipconfig /renew to ensure that the DHCP IP configuration on a workstation is updated. However, the workstation does not receive a valid IP configuration for the network. Which problems may exist on the network?

1. The ipconfig /all command must be issued to restore all IP configurations.
2. There is no network connectivity to the DHCP server.
3. The DHCP lease time is misconfigured.
4. There is a DHCP server issue.
5. The gateway router address needs to be updated.

3. Refer to the exhibit. The command output is from a wireless DHCP host connected to a Linksys integrated router. What can be determined from the output?

1. There is a DNS problem.
2. The DHCP configuration needs to be checked.
3. The connection to the SSID needs to be verified.
4. The new wireless NIC needs to be installed.
5. An incorrect cable is being used between the host and the router.

4. A customer called the cable company to report that the Internet connection is unstable. After trying several configuration changes, the technician decided to send the customer a new cable modem to try. What troubleshooting technique does this represent?

1. Divide-and-conquer
2. Top-down
3. Bottom-up
4. Substitution

5. A small office uses a wireless router to connect to a cable modem for Internet access. The network administrator receives a call that one office computer cannot access external websites. The first troubleshooting step that the network administrator performs is to ping the wireless router from the office computer. Which troubleshooting technique does this represent?

1. Bottom-up
2. Substitution
3. Divide-and-conquer
4. Top-down

6. A network administrator can successfully ping the server at www.cisco.com but cannot ping the company web server located at an ISP in another city. Which tool or command would help identify the specific router where the packet was lost or delayed?

1. telnet
2. ipconfig
3. traceroute
4. netstat

7. Which command would a technician use to display network connections on a host computer?

1. nslookup
2. tracert
3. ipconfig
4. netstat

8. Which items should be documented after troubleshooting an internal web server crash? (Choose three.)

1. Steps that were performed that failed to identify the cause of the problem
2. When the problem occurred
3. Steps that were performed to identify the cause of the problem
4. The dialogue with the user
5. The configuration of all hosts on the LAN at the time of the crash
6. The configuration of all networking devices on the LAN at the time of the crash

9. A user calls the help desk to report a workstation problem. Which questions would produce the most helpful information for troubleshooting? (Choose three.)

1. What operating system version is running on your workstation?
2. Have you performed a backup recently?
3. What changes have you made to your workstation?
4. If you received an error message, what was it?
5. Do you have the warranty for your workstation?
6. Have you used a network monitoring tool on your workstation?

10. What are common causes of a physical layer network connectivity problem? (Choose two.)

1. An Ethernet cable plugged into a wrong port
2. A faulty Ethernet cable
3. An incorrect default gateway
4. An unassigned IP address
5. A monitor unplugged

11. Refer to the exhibit. A web designer calls to report that the web server web-s1.cisco.com is not reachable through a web browser. The technician uses command-line utilities to verify the problem and to begin the troubleshooting process. Which things can be determined about the problem? (Choose two.)

1. The web server at 192.168.0.10 is reachable from the source host.
2. There is a problem with the web server software on web-s1.cisco.com.
3. DNS cannot resolve the IP address for the server web-s1.cisco.com.
4. The default gateway between the source host and the server at 192.168.0.10 is down.
5. A router is down between the source host and the server web-s1.cisco.com.

12. Which step should be taken next after a problem is resolved during a troubleshooting process?

1. Update the documentation.
2. Consult an FAQ.
3. Run remote-access software.
4. Escalate the problem.