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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.

Read the first 7 CWS WLAN Troubleshooting flashcards as text

  1. Which tool captures 802.11 frames for detailed protocol-level analysis?

    Answer: Wireless protocol analyzer (packet sniffer)

    A wireless protocol analyzer captures 802.11 frames at the MAC layer for detailed analysis of association, authentication, and data exchange sequences.

  2. A wireless client can associate with the AP but cannot reach any internet resources. Pinging the default gateway succeeds. What is the most likely cause?

    Answer: DNS resolution failure

    If the default gateway is reachable but internet resources are not, DNS failure is most likely since domain names cannot be resolved to IP addresses.

  3. What does RSSI measure in a wireless network?

    Answer: The relative power level of the received RF signal at the receiver

    RSSI (Received Signal Strength Indicator) is a measurement of the power level of the received RF signal, typically expressed as a negative value in dBm.

  4. When multiple APs in the same area are configured to use the same 802.11 channel, what problem results?

    Answer: Co-channel interference (CCI) and increased contention

    Co-channel interference (CCI) forces all devices sharing the same channel to contend for the medium, reducing throughput and increasing latency.

  5. A wireless user reports slow speeds only in a specific conference room while other areas work fine. What is the most likely cause?

    Answer: RF interference or poor signal coverage in that area

    Location-specific performance issues typically point to RF factors such as signal attenuation, multipath, or localized interference in that particular area.

  6. Which of the following is a Layer 2 WLAN troubleshooting issue?

    Answer: Authentication or association failure with the AP

    Authentication and association are Layer 2 (MAC layer) processes; failures at this stage prevent the client from completing the wireless connection.

  7. What is the purpose of conducting a post-deployment site survey for WLAN troubleshooting?

    Answer: To verify that actual signal coverage and channel usage match the design

    A post-deployment site survey validates that the installed WLAN delivers the expected coverage, channel plan, and signal quality as designed.