CWNP CWAP-405 : Certified Wireless Analysis Professional

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CWNP CWAP-405 Exam Syllabus Topics:

CWNP Certified Wireless Analysis Professional Sample Questions:

1. As a wireless network consultant you have been called in to troubleshoot a high-priority issue for one of your customers. The customer's office is based on two floors within a multi-tenant office block. On one of these floors (floor 5) users cannot connect to the wireless network. During their own testing the customer has discovered that users can connect on floor 6 but not when they move to the floor 5. This issue is affecting all users on floor 5 and having a negative effect on productivity.
To troubleshoot this issue, you perform both Spectrum and Protocol Analysis. The Spectrum Analysis shows the presence of Bluetooth signals which you have identified as coming from wireless mice. In the protocol analyzer you see the top frame on the network is Deauthentication frames. On closer investigation you see that the Deauthentication frames' source addresses match the BSSIDs of your customers APs and the destination address is FF:FF:FF:FF:FF:FF:FF.
What do you conclude from this troubleshooting exercise?

A) The CCI from the APs on the floor 4 is the problem and you need to ask the tenant below to turn down their AP's Tx power
B) The customers APs are misbehaving and a technical support case should be open with the vendor
C) The customer should replace all their Bluetooth wireless mice as they are stopping the users on floor 5 from connecting to the wireless network
D) The users on floor 5 are being subjected to a denial of service attack, as this is happening across the entire floor it is likely to be a misconfigured WIPS solution belonging to the tenants on the floor below

2. When the Protected bit in the Frame Control field of the MAC header is set to 0, it always indicates:

A) This is an RSN
B) The frame body is unencrypted
C) Encryption is not enabled for the entire BSS
D) The AP is not operating in FIPS mode

3. A manufacturing facility has installed a new automation system which incorporates an 802.11 wireless network. The automation system is controlled from tablet computers connected via the WLAN. However, the automation system has not gone live due to problem with the tablets connecting to the WLAN. The WLAN vendor has been onsite to perform a survey and confirmed good primary and secondary coverage across the facility. As a CWAP you are called in to perform Spectrum Analysis to identify any interference sources. From the spectrum analysis, you did not identify any interference sources but were able to correctly identify the issue. Which of the following issues did you identify from the spectrum analysis?

A) The tablets are entering power save mode and failing to wake up to receive the access points transmissions
B) The tablets are connecting to the wrong SSID
C) A high noise floor has resulted in a SNR of less than 20dB
D) There is a power mismatch between the APs and the clients

4. IEEE 802.11-2007 specifies two ERP protection mechanisms: RTS/CTS and CTS-to-Self. Which statement is true regarding these two protection mechanisms? (Choose 2)

A) By definition, all associated client stations in a BSS can hear RTS, CTS, and CTS-to-Self frames, so RTS/CTS and CTS-to-Self mechanisms have equal effectiveness.
B) Use of RTS/CTS requires more overhead than CTS-to-Self due to a higher number of frames transmitted onto the wireless medium.
C) RTS and CTS frames use Short Interframe Spaces (SIFS), and CTS-to-Self frames use PCF Interframe Spaces (PIFS).
D) A CTS-to-Self frame sent by a client station may reach fewer nodes than the RTS/CTS frame exchange.
E) Aside from the Subtype subfield of the Frame Control field, the generic MAC header format of RTS and CTS frames are identical.
F) RTS and CTS frames are relayed through the access point, whereas the CTS-to-Self frames are not.

5. 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) It varies because the backoff algorithm is random.
B) The contention window approximately doubles in size.
C) The slot time within the contention window decreases by 50%.
D) The contention window is immediately closed, and the frame is retransmitted.
E) The contention window is not affected by failed Data frame delivery.

Solutions: