CWAP-403 Online Practice Questions and Answers

An RST frame should be acknowledged by which frame?

A. Ack

B. CTS

C. Block Ack

D. RTS-Ack

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. 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.

B. 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.

C. The STA is transmitting data using more spatial streams than the potable analyzer can support

D. The portable analyzer is too close to the AP causing CCI, blinding the AP to the client's packets

Where, in a protocol analyzer, would you find an indication that a frame was transmitted as part of an AMPDU?

A. The HT Operation Element

B. A-MPDU flag in the HT Control Field

C. A-MPDU flag in the Frame Control Field

D. The Aggregation flag in the Radio Tap Header

A client is operating in an unstable RF environment. Out of five data frames transmitted to the client it only receives four. The client sends a Block Ack to acknowledge the receipt of these four frames but due to frame corruption the Block Ack is not received by the AP. Which frames will be transmitted?

A. Only the data frame which was corrupted

B. Both the corrupted data and Block Ack

C. All data frames

D. Only the Block Ack

What is the formula used to calculate the Duration field value in an RTS frame?

A. RTS Duration field = CTS duration

B. RTS Duration field = Data or management to be sent frame duration

C. RTS Duration field = Data or management frame to be sent duration + CTS duration + one ACK duration + three SIFS

D. RTS Duration field = Data or management frame to be sent duration + CTS duration

Which piece of information Is not transmitted in an HT PDDU header?

A. Number of Spatial Streams

B. PPDU length

C. Channel number

D. MCS index

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 BSSISs 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 customer should replace all their Bluetooth wireless mice as they are stopping the users on floor 5 from connecting to the wireless network

B. 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

C. The customers APs are misbehaving and a technical support case should be open with the vendor

D. 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

In a Spectrum Analyzer the Swept Spectrogram plot displays what information?

A. The RF time domain

B. RF power present at a particular frequency over the course of time

C. Wi-Fi Device information

D. Duty cycle in the frequency domain

Why would a STA that supports 802.11k Radio Measurement send a Neighbor Request to an AP?

A. To learn about neighboring interference sources and tune its RF radio accordingly

B. To inform the current AP about the STA's intent to roam to a neighboring AP, ensuring a seamless handover

C. To request a list of neighboring APs which the STA can use as roaming candidates

D. To request a list of neighboring STAs which enables the STA to better pick the right protectionmechanisms

During a VHT Transmit Beamforming sounding exchange, the beamformee transmits a Compressed Beamforming frame to the beamformer. What is communicated within this Compressed Beamforming frame?

A. Steering Matrix

B. Beamforming Matrix

C. Feedback Matrix

D. Beamformee Matrix