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CWNP Certified Wireless Analysis Professional Sample Questions:
1. You are troubleshooting a client that is experiencing slow WLAN performance. As part of the troubleshooting activity, you start a packet capture on your laptop close to the client device. While analyzing the packets, you suspect that you have not captured all packets transmitted by the client. By analyzing the trace file, how can you confirm if you have missing packets?
A) The missing packets will be shown as CRC errored packets
B) Retransmission are an indication of missing packets
C) Look for gaps in the sequence number in MAC headers
D) Protocol Analyzers show the number of missing packets in their statistics view
2. What does the value of the Listen Interval field in an Association Request frame indicate?
A) How often a STA will go off channel to look for other BSSs
B) How often a STA in power save mode wakes up to listen to Beacon frames
C) How long a STA performing active scanning will listen for Probe Responses before changing channels
D) How long a STA waits for an Ack before retransmitting the frame
3. How many frames make up the Group Key Handshake excluding any Ack frames that may be required?
A) 2
B) 3
C) 1
D) 4
4. 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 than 2% of all packets are retransmissions. You move to capture packets by the AP and, while the retry rate is still less than 2%, you now only see unidirectional traffic from the AP to the client. How do you explain this behavior?
A) The STA is transmitting data using more spatial streams than the potable analyzer can support
B) 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
C) The portable analyzer is too close to the AP causing CCI, blinding the AP to the client's packets
D) 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
5. You are troubleshooting an 802.1X\EAP exchange and see the AP sends an initial EAP Request for Identity, the client responds with an EAP response frame containing an identity. Though the AP acknowledges receipt of the EAP response no more EAP messages are transmitted. What should be the next steps in the 802.1X\EAP Authentication?
A) The AP should send an EAP request to the supplicant for the user's password or certificate.
B) The AP should verify that the identity is valid with the RADIUS server and then either transmit an EAP-Success or EAP-Warning message.
C) The AP should forward the EAP Response to the RADIUS sever and will in turn forward RADIUS server responses in an EAP Request packet to the supplicant
D) The AP should request an EAPoL-Start message from the supplicant
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: B | Question # 3 Answer: A | Question # 4 Answer: D | Question # 5 Answer: C |
By Bruce
