Practice Test Geeks(CWS) Certified Wireless Specialist Practice Test
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Research Methods & Evidence-Based Practice 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 Research Methods & Evidence-Based Practice flashcards as text

  1. During a wireless network assessment, you collect throughput data at 30 locations. The results are heavily skewed by three locations with unusually low values. Which measure of central tendency BEST represents typical network performance?

    Answer: Median

    The median is resistant to outliers, making it the best representation of typical performance when extreme low values skew the distribution.

  2. An engineer performs both passive and active surveys at the same location. The passive survey shows strong RSSI, but the active survey reveals low throughput. What is the MOST likely explanation?

    Answer: Hidden node interference or high retry rates are degrading actual link performance

    Strong RSSI with poor throughput typically indicates MAC-layer issues like excessive retries caused by hidden nodes or high interference, not physical signal weakness.

  3. When using iPerf3 to benchmark wireless throughput, running the test in which direction provides the MOST insight into uplink performance for VoIP quality assessment?

    Answer: Client to server (uplink)

    For VoIP, uplink performance is critical because voice from the client to the server must be assessed; running iPerf3 client-to-server measures this direction.

  4. A wireless engineer finds that channel utilization consistently exceeds 70% in a high-density auditorium. What evidence-based design change is MOST appropriate?

    Answer: Add APs on non-overlapping channels to distribute the load

    Adding APs on non-overlapping channels distributes client load and reduces per-AP utilization, which is the evidence-based solution for channel saturation.

  5. Which protocol capture filter would BEST isolate 802.11 management frames to analyze roaming behavior in a Wireshark capture?

    Answer: wlan.fc.type == 0

    In 802.11, frame type 0 designates management frames, which include probe requests/responses, association, and authentication frames used during roaming.

  6. A network team wants to establish a repeatable benchmarking methodology for quarterly wireless performance reviews. Which approach BEST ensures result comparability over time?

    Answer: Use the same physical test locations, client device, tool versions, and time of day for each assessment

    Consistent test locations, devices, tools, and timing control variables, making quarter-over-quarter comparisons statistically valid.

  7. What is the PRIMARY purpose of a spectrum analysis walk-through BEFORE a predictive wireless design is finalized for a new building?

    Answer: To detect existing non-Wi-Fi RF sources that the predictive model would not account for

    Pre-design spectrum analysis identifies non-Wi-Fi interferers (DECT phones, Bluetooth devices, microwave ovens, radar) that RF planning tools cannot model.