Module : Troubleshooting at the Physical Layer
Module Overview
Characteristics of Physical Layer Optimization Problems
Performance lower than baseline
Exceeding cable design limits, poor quality cabling and connections
Noise
Collisions
Other data transmission issues
Resources
Utilization
Console messages
Identifying Physical Layer Problems
Power related
Cabling faults – CAT5
Cabling faults – fiber and coax
Hardware
Collision based problems – shared media
Configuration script errors
CPU overload
Isolating Physical Layer Problems
Methodology
Tools for the job
Bad cabling
Cabling incorrect
Operational statistics
Implementing Physical Layer Solutions
Solving common problems – Methodology
ARP commands
Solving common problems – Windows, UNIX/Mac OS end-system commands
Solving common problems – Cisco IOS commands
Redundancy
Solving common problems – support resources
Module: Summary
Module: Quiz



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