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CWS WLAN Troubleshooting Flashcards

7 cards from real CWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What tool is primarily used to identify non-802.11 RF interference sources in a WLAN environment?

    Answer: Spectrum analyzer

    A spectrum analyzer detects all RF energy across frequency bands, including non-802.11 sources like microwave ovens and Bluetooth devices.

  2. A wireless client shows 'Limited Connectivity' despite successfully associating with the AP. What is the most likely cause?

    Answer: DHCP failure or IP address conflict

    'Limited Connectivity' means Layer 2 association succeeded but IP address assignment failed, pointing to a DHCP issue.

  3. A high retry rate on a wireless AP most commonly indicates which condition?

    Answer: Poor RF signal quality or channel interference

    High retry rates indicate frames are not being acknowledged, typically due to poor signal, interference, or excessive channel contention.

  4. Which Windows command displays the wireless adapter's current IP address and connection details?

    Answer: ipconfig /all

    The ipconfig /all command displays all network adapter configuration details including IP address, subnet mask, default gateway, and DHCP info.

  5. A single wireless client cannot connect to the WLAN while all other clients work fine. What should be checked first?

    Answer: Client's wireless adapter drivers and settings

    When only one client is affected, the issue is likely specific to that device's wireless adapter, drivers, or configuration rather than a network-wide problem.

  6. What does SNR (Signal-to-Noise Ratio) measure in a wireless network?

    Answer: The difference in dB between received signal strength and the noise floor

    SNR is the difference between the received signal strength and the noise floor in decibels; higher SNR values indicate better signal quality and link reliability.

  7. During WLAN troubleshooting, a protocol analyzer captures an unusually high number of deauthentication frames. What could this indicate?

    Answer: A potential DoS attack or rogue AP forcing client disconnections

    An excessive number of deauthentication frames can indicate a deauthentication flood denial-of-service attack or a rogue AP forcing clients off the network.