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CWNA®: Certified Wireless Network Administrator Official Study Guide by David A. Westcott, David D. Coleman

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Chapter 12. WLAN Troubleshooting

IN THIS CHAPTER, YOU WILL LEARN ABOUT THE FOLLOWING:

  • Layer 2 retransmissions

    • RF interference

    • Multipath

    • Adjacent cell interference

    • Low SNR

    • Mismatched power settings

    • Near/far

    • Hidden node

  • 802.11 coverage considerations

    • Dynamic rate switching

    • Roaming

    • Layer 3 roaming

    • Co-channel interference

    • Channel reuse/multiple channel architecture

    • Single channel architecture

    • Capacity vs. coverage

    • Oversized coverage cells

    • Physical environment

  • Voice vs. data

  • Performance

  • Weather

WLAN Troubleshooting

As with most networking technologies, most problems usually exist at the Physical layer. Simple layer 1 problems such as nonpowered access points or client card driver problems are ...

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