5.0 Network Troubleshooting

[5.1] Explain the network troubleshooting methodology

Identify the Problem

Establish a Theory of Probable Cause

Test the Theory to Determine the Cause

Establish a Plan of Action to Resolve the Problem

Implement the Solution or Escalate

Verify Full System Functionality & Implement Preventive Measures

Document Findings, Actions, Outcomes, Lessons Learned

[5.2] Given a scenario, troubleshoot common cable connectivity issues and select the appropriate tools

Specifications and Limitations

Cable Considerations

Cable Application

Common Issues

Common Tools

[5.3] Given a scenario, use the appropriate network software tools and commands

Software Tools

Command Line Tool

Basic Network Platform Commands

[5.4] Given a scenario, troubleshoot common wireless connectivity issues

Specifications and Limitations

Considerations

Common Issues

[5.5] Given a scenario, troubleshoot networking issues

Considerations

Common Issues

Broadcast Storms: If broadcast frames are received by two switches, they can forward frames to each other --> multiple copies of frame are forwarded, replicated, and forwarded again until the network is consumed with forwarding copies of the same initial frame