CWAP-404 by CWNP Actual Free Exam Q&As

Question 1

When evaluating modulation and coding schemes, you must determine the best coding rate available.
In 802.11 MCS tables, what is the best coding rate from the perspective of highest data rates?

A. 5/6 B. 2/3 C. 3/4 D. 1/2

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Correct Answer: A Vote an answer

Question 2

Shown is a screenshot of a wireless protocol analyzer displaying the decode information for a single 802.11 encrypted data + CF-Poll frame. The infrastructure BSS on which this information was captured is using WEP and this particular frame was sent from a client station (STA) to an access point (AP).

As a protocol analyst, how would you explain the existence of this frame on the wireless medium given the information in the decode?

A. The frame was sent by a client station that does not comply with IEEE HR/DSSS standard to an access point that is Wi-Fi certified. B. The access point is operating as a repeater, and clients must poll repeater access points in order to transmit data frames through them. C. The IEEE 802.11 network is using both version 1 and version 2 protocols simultaneously. This unexpected frame is from the version 2 protocol set. D. The frame was misinterpreted because of insufficient information received by the analyzer due to frame corruption.

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Correct Answer: D Vote an answer

Question 3

You have been asked to recommend a solution for protocol capture of 802.11 frames consisting of 3x3:3 802.11ac communications. The requirement specifies that you gain a general view of a coverage area and does not require that you capture from specific user locations. The solution must be the least expensive practical solution possible that does not disrupt user access to the WLAN and it must be based on enterprise WLAN hardware.
What solution would you recommend so that any coverage area could be monitored on demand?

A. Install Wireshark on the Aps natively to allow dynamic capture while serving clients B. Install laptop-based protocol analyzer near each AP C. Install the minimum number of Aps required for coverage and use these Aps for protocol analysis as needed D. Install sufficient Aps so that an AP can be taken offline to perform protocol analysis as needed

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Correct Answer: D Vote an answer

Question 4

The network administrator at ABC Engineering has taken a large packet capture from one of their APs running in monitor mode. She has very little knowledge of 802.11 protocols but would like to use the capture file to evaluate the overall health and performance of their wireless network.
When she asks your advice, which tool do you recommend she opens the packet capture file with?

A. WLAN scanner B. Python C. Capture visualization tool D. Spectrum analyzer

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Correct Answer: C Vote an answer

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Question 5

In the frame decode shown, there are two sets of supported data rates. 1, 2, 5.5, and 11 Mbps are all shown as "basic" data rates, and 6, 9, 12, 18, 24, 36, 48, and 54 Mbps are shown simply as supported data rates.

What is true of "basic" data rates in this context?

A. The AP requires all client stations to support Basic rates in order to associate to its BSS. B. The highest data rate set to Basic is automatically used to send broadcast traffic such as Beacon frames. C. Basic rates are optional data rates for the BSS, often used for assuring connectivity for legacy stations. D. Basic rates are defined in an AP's service set to specify mandatory data rates for all retry frames. E. Basic rates are only used for multicast traffic, and do not affect unicast traffic.

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Question 6

Using a portable analyzer you perform a packet capture next to a client STA and you can see that the STA is associated to a BSS. You observe the STA sending packets to the AP and the AP sending packets to the STA. Less the 2% of all packets are retransmissions. You move to capture packets by the AP and, while the retry rate is still very low, you now only see unidirectional traffic from the AP to the client. How do you explain this behavior?

A. The portable analyzer has a lower receive sensitivity than the AP and while it can't capture the packets from the client STA, the AP can receive them OK. B. The portable analyzer is too close to the AP causing CCI, blinding the AP to the client's packets C. The STA is transmitting data using more spatial streams than the potable analyzer can support D. There is a transmit power mismatch between the client and the AP and while the client can hear the Aps traffic, the AP cannot hear the client.

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Question 7

Which statement is true regarding the Association Identifier (AID) used in IEEE 802.11 WLANs?

A. The AID field is present only in Beacons frames. B. The client station is assigned an AID value in the 802.11 authentication response frame. C. The AID has a maximum value of 2007, and resides in the duration/ID field of a PS-Poll frame. D. The AID is used by the access point in EDCA mode to reduce duplicate transmissions when sending multicasts. E. The AID has a maximum value of 2048, and is used to uniquely identify a wireless client station associated with an access point.

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Correct Answer: C Vote an answer

Question 8

Given: Your network consists of HT and ERP access points, and you are implementing VoWiFi with support for U-APSD.
When an ERP handset operating in WMM Power Save mode with a ReceiveDTIMs parameter of TRUE receives a Beacon containing a DTIM indicating queued broadcast traffic, what task is the handset required to perform?

A. The handset is to remain awake to receive the broadcast frame(s) following the Beacon that contains the DTIM. B. The handset must broadcast a CTS-to-Self frame indicating the station's need to control the medium long enough to receive all of the broadcast frames. C. The handset must send a PS-Poll frame to the access point for every broadcast frame it receives with the More Data bit set to one. D. The handset must arbitrate for the medium and immediately issue an RTS directed to the access point with the NAV set to a value of 32,768.

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Question 9

Given: Protocol analyzer often have useful graphical dashboards providing information about the health and operations of the WLAN.
What is a valid use of a graph showing the Top APs Based on Active Associations?

A. Evaluating the capacity handling on a specific channel B. Ensuring compliance with corporate security policies C. Discovering the total number of client STAs on your network D. Locating overloaded APs

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Correct Answer: D Vote an answer

CWNP Certified Wireless Analysis Professional - CWAP-404 Exam Practice Test