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CWS Wireless Client Devices 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. Which 802.11ax (Wi-Fi 6) feature allows an AP to schedule specific wake times for client devices, significantly improving battery life for IoT clients?

    Answer: Target Wake Time (TWT)

    TWT allows devices to negotiate scheduled sleep and wake intervals with the AP, dramatically reducing power consumption.

  2. A wireless client NIC supports 2×2:2 MIMO. What does the last number '2' indicate?

    Answer: Number of spatial streams

    In the TxR:S notation, S (the last number) represents the number of supported spatial streams.

  3. Which client capability allows it to receive data from multiple APs simultaneously in an 802.11 network (multi-link operation)?

    Answer: 802.11be Multi-Link Operation (MLO)

    MLO, introduced in 802.11be (Wi-Fi 7), allows a client to simultaneously transmit and receive across multiple frequency bands or channels.

  4. When a client performs an 802.11r Fast BSS Transition, what is the primary benefit compared to a standard reassociation?

    Answer: Reduced roaming latency by pre-establishing keys at the target AP

    802.11r pre-authenticates and pre-derives keys at the target AP, reducing roam time from hundreds of milliseconds to tens.

  5. A client device supports WPA3-Enterprise 192-bit mode. Which cipher suite does this mandate?

    Answer: GCMP-256 with SHA-384

    WPA3-Enterprise 192-bit security mode requires GCMP-256 encryption and SHA-384 for HMAC, aligned with CNSA suite requirements.

  6. What information does a wireless client obtain from an 802.11k Neighbor Report?

    Answer: A list of nearby APs with channel and BSSID information to assist roaming decisions

    802.11k Neighbor Reports give clients a list of candidate APs (BSSID, channel, RSSI) so they can roam without performing a full scan.

  7. Which wireless client behavior is described as 'transmit power control' (TPC)?

    Answer: The client adjusting its output power based on AP instructions or distance to reduce interference

    TPC allows clients to reduce transmit power based on AP feedback, minimizing co-channel interference with neighboring cells.