Exam Details

  • Exam Code
    :PW0-270
  • Exam Name
    :Certified Wireless Analysis Professional
  • Certification
    :CWAP Certifications
  • Vendor
    :CWAP
  • Total Questions
    :60 Q&As
  • Last Updated
    :Mar 25, 2024

CWAP CWAP Certifications PW0-270 Questions & Answers

  • Question 31:

    When an originator QoS STA initiates a BlockAck agreement with a recipient QoS STA, what is the first frame sent by the originator?

    A. BlockAckSetupReq

    B. BlockAckReq

    C. ADDBA Request

    D. BlockAckPolicyReq

    E. ActionBAReq

  • Question 32:

    In an HT WLAN in which a delayed Block Ack policy is set up, what should result when an ACK frame is not received by the originator in response to a Basic BlockAckReq?

    A. All frames within that block must be retransmitted by the originator.

    B. The last frame within that block must be retransmitted by the originator.

    C. The BlockAckReq must be retransmitted by the originator.

    D. Nothing. No ACK is expected in response to a Basic BlockAckReq.

  • Question 33:

    According to the 802.11n-2009 amendment, what security requirement is specified for HT BSSs?

    A. In an RSN, HT stations may not communicate with one another using TKIP.

    B. TKIP cannot be supported in an HT BSS.

    C. All unicast traffic transmitted by an HT station and destined to an HT station must use AES-CCMP.

    D. HT BSSs are prevented from supporting WEP.

    E. HT BSSs must mandatorily support 802.11r FT.

  • Question 34:

    The 802.11r-2008 amendment to the 802.11 specification introduces what new Information Elements (IEs) to facilitate fast BSS transitions? (Choose 2)

    A. RSN IE (Robust Security Network)

    B. FSR IE (Fast Secure Roaming)

    C. HT IE (High Throughput)

    D. MD IE (Mobility Domain)

    E. FT IE (Fast Transition)

    F. DS IE (Distribution System)

  • Question 35:

    To effect Preauthentication, a STA's supplicant sends an IEEE 802.1X/EAPoL Start message. How is the EAPoL Start message addressed?

    A. DA = MAC of default gateway; RA = BSSID of the AP to which the STA is associated

    B. DA = BSSID of targeted AP; RA = BSSID of the AP to which the STA is associated

    C. DA = MAC of the default gateway; RA = Ethernet MAC of the targeted AP

    D. DA = BSSID of the targeted AP; RA = Ethernet MAC of the targeted AP

  • Question 36:

    Which statement accurately describes IEEE 802.11 Power Save operation in a Basic Service Set that does not support the QoS facility?

    A. Following a period of time in a low power state, client stations wake themselves and automatically poll the access point for traffic using a PS-Poll frame.

    B. When the access point's buffer is full, the access point wakes all client stations using a PS-Poll frame so that they can receive the data.

    C. Upon receiving traffic for a dozing station, the access point wakes the client station using a PS-Poll frame so that the client station can receive the data.

    D. After waking from a low power state, client stations listen for the next Beacon to determine if sending a PS-Poll frame to the access point is necessary.

    E. After waking at a scheduled TBTT, client stations send Null Function frames to the access point with the Power Management bit set back to zero.

  • Question 37:

    What must occur before an HT STA operating in an EDCA BSS can transmit a data frame over the wireless medium? (Choose 3) A. Its NAV must be equal to one.

    B. The STA must receive a BlockAck, resetting the NAV to zero.

    C. The appropriate interframe space must expire.

    D. The backoff timer for the AC must equal zero.

    E. Its CCA must report that the medium is idle.

    F. The AP must issue the STA a TXOP.

  • Question 38:

    In the analyzer trace shown, the TBTT is nominally 102.5 milliseconds.

    Why does the Beacon transmission interval vary?

    A. The access point must arbitrate to gain access to the RF medium in order to transmit a Beacon.

    B. The DCF Interframe space (DIFS) is nominally 50 祍, but typically varies by as much as 10 祍, which causes delays in Beacons.

    C. This trace shows an HT network where HR/DSSS nodes are active on the network. The access point is changing slot times from short to long as needed.

    D. Beacon frames vary in size, and therefore some take slightly longer to send than others.

  • Question 39:

    Which statements are true regarding wireless network discovery and scanning processes for an HT network? (Choose 2)

    A. Client stations may continually send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner, regardless of their association state.

    B. Access points send Beacon frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner including the channel for which the access point is configured.

    C. Client stations send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner until they associate with an access point. After associating to an access point, they no longer transmit Probe Request frames.

    D. Access points send Beacon frames only on the HT channel in the 2.4 GHz ISM band for which the access point is configured, and only after scanning that channel to discover existing BSSs.

    E. Client stations send Probe Request frames on all HT channels in the 2.4 GHz ISM band in a consecutive manner until they receive at least 3 Probe Response frames.

  • Question 40:

    An HT STA does not receive an ACK for a first-attempt data frame that it transmitted. Assuming this STA is not using BlockAcks in this case, what happens to the HT STA's EDCA contention window?

    A. The slot time within the contention window decreases by 50%.

    B. It varies because the backoff algorithm is random.

    C. The contention window approximately doubles in size.

    D. The contention window is not affected by failed Data frame delivery.

    E. The contention window is immediately closed, and the frame is retransmitted.

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