Chapter Eleven. Troubleshooting

This chapter covers the following official CCNA Routing and Switching 200-120 exam topics:

► Troubleshoot and resolve Layer 1 problems.

► Troubleshoot and resolve VLAN problems.

► Troubleshoot and resolve trunking problems on Cisco switches.

► Troubleshoot and correct common problems associated with IP addressing and host configurations.

► Troubleshoot and resolve ACL issues.

Troubleshoot Layer 1 Problems

CramSaver

If you can correctly answer these questions before going through this section, save time by skimming the Exam Alerts in this section and then completing the Cram Quiz at the end of the section.

1. What is likely to cause CRC errors? Choose two.

A. Speed mismatch

B. Duplex mismatch

C. Damaged cables ...

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