Chapter 22

Troubleshoot Common Cabling Problems

This chapter covers the following topics related to Objective 5.2 (Given a scenario, troubleshoot common cable connectivity issues and select the appropriate tools) of the CompTIA Network+ N10-008 certification exam:

  • Specifications and limitations

    • Throughput

    • Speed

    • Distance

  • Cable considerations

    • Shielded and unshielded

    • Plenum and riser-rated

  • Cable application

    • Rollover cable/console cable

    • Crossover cable

    • Power over Ethernet

  • Common issues

    • Attenuation

    • Interference

    • Decibel (dB) loss

    • Incorrect pinout

    • Bad ports

    • Open/short

    • Light-emitting diode (LED) status indicators

    • Incorrect transceivers

    • Duplexing issues

    • Transmit and receive (TX/RX) reversed

    • Dirty optical cables

  • Common tools

    • Cable crimper

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