Practice Test GeeksCertified Wireless Design Professional (CWDP) Practice Test
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CWDP QoS and Voice/Video over WLAN Flashcards

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

Read the first 6 CWDP QoS and Voice/Video over WLAN flashcards as text

  1. What is the recommended minimum RSSI for a VoIP client to maintain acceptable call quality?

    Answer: -67 dBm

    A minimum RSSI of -67 dBm is widely recommended for VoWLAN to ensure sufficient SNR for reliable MCS rates and low retries.

  2. How does 802.11k (neighbor reports) assist in VoWLAN deployments?

    Answer: It provides clients with a list of neighboring APs to speed up roaming decisions

    802.11k neighbor reports allow clients to quickly identify candidate APs for roaming, reducing handoff latency for active voice calls.

  3. What is the maximum recommended packet loss rate for G.711 VoIP over WLAN to maintain MOS score above 3.5?

    Answer: 1%

    Packet loss above 1% noticeably degrades MOS scores for G.711, causing clipping and gaps in voice streams.

  4. Which video streaming protocol benefit most from WMM AC_VI (Video) prioritization over WLAN?

    Answer: Real-time conferencing using RTP video streams

    RTP-based video conferencing is delay-sensitive and benefits from AC_VI's higher priority and shorter contention windows.

  5. A CWDP is designing a hospital WLAN for VoIP over Wi-Fi phones. Which frequency band should be preferred and why?

    Answer: 5 GHz for more non-overlapping channels and less interference

    5 GHz provides more non-overlapping channels (up to 25 in the US), reducing co-channel interference in dense deployments.

  6. What does the Mean Opinion Score (MOS) measure in VoWLAN assessments?

    Answer: Subjective voice quality rated on a scale of 1 to 5

    MOS is a subjective perceptual score from 1 (bad) to 5 (excellent) used to rate end-user voice quality experience.

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  1. cwnp.com — Test delivery, retake policy, score release, eligibility, fees, exam format, renewal, time limit, score validity · verified Oct 2026