Content

| Summary

In this module the following topics were covered:

- Characteristics of physical layer problems
- Characteristics of physical layer optimization problems
- End-system and Cisco commands and applications for gathering information about physical layer components
- Common physical layer problems
- Guidelines for isolating problems at the physical layer
- End-system and Cisco commands and applications for configuring physical layer components
- Common physical layer problem resolutions
- Support resources for troubleshooting physical layer components
- A procedure for correcting physical layer problems