CWDP-304 Exam Training Practice Tests (CWNP Certified Wireless Design Professional)]

Question 1

What statements are true regarding jitter and latency?(Choose all that apply.) Response:

A. Latency is a measurement of the time delay experienced in the delivery of a frame. B. Jitter is a measurement of average latency based on a sample of >100 frames. C. Jitter is a measurement of the variance of the number of frames received from an application for a specific time interval. D. Latency is a measurement of the time required to transmit two subsequent frames. E. Jitter is a measurement of latency variability from one frame to another.

Correct Answer: A,E

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Question 2

During an RFP analysis, one of the vendors mentioned that you'll need to upgrade your Gigabit Ethernet switches to MultiGig switches to ensure support for
802.11ac and 802.11ax, which both offer data rates over 1Gbps. Why is this not sound advice?

A. Because 802.11ac only supports one spatial stream B. Management overhead that is normal in WLANs will reduce the throughput of the client devices C. Because neither of the technologies support data rates over 1Gbps D. Because 802.11ax doesn't support channel bonding

Correct Answer: B

Question 3

You told your customer that multipath fading may be mitigated simply by moving one or both of the receivers antennas a small amount, usually by one to four wavelengths away from its original position. Your customer is prepared to make the change, but does not know the wavelength for
802.11ac.
What is the approximate wavelength of an 802.11ac radio wave?

A. 12 cm (4.72 inches) B. 5.5 cm (2.16 inches) C. 45 cm (17.71 inches) D. 15.24 cm (6 inches)

Correct Answer: B

Question 4

You desire to achieve a 450 Mbps MCS. What 802.11n features (from the numbered list below) are required?
1. Frame aggregation
2. Short GI
3. 40 MHz channels
4. 2 spatial streams
5. 3 spatial streams
6. Transmit beamforming (TxBF)

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

Correct Answer: A

Question 5

An engineering firm just upgraded their WLAN form nine 802.11n APS to nine 802.11ac APs. After this upgrade, they did not see any improvement in throughput. What is the most likely cause of this result?
Response:

A. APs are mounted on the wall B. The APs are still using the 5 GHz lower band C. APs are transmitting at a low transmit power D. The clients were not upgraded

Correct Answer: D

Question 6

A wireless network with fewer APs at higher power levels to cover a large area is said to be which of the following?
Response:

A. Ideal for roaming B. Destined for failure C. Capacity based D. Coverage based

Correct Answer: D

Question 7

In a PC-based spectrum analyzer, what data chart identifies the overall RF utilization of a specific frequency in the environment being surveyed?

A. FFT Average B. Swept Spectrogram C. FFT Max Hold D. Duty cycle

Correct Answer: B

Question 8

A wireless engineer from your company performed a site survey in an office building where a wireless network extension was needed. He reports that while performing a Layer 1 sweep near a meeting room full of people, he detected RF activity with a very low duty cycle. He is unsure how to interpret what he recorded to determine its impact on a future Wi-Fi network.
What is true about this RF environment and its potential impact on the WLAN?

A. The signal affects the entire spectrum and will render the wireless network unusable. It must be located and removed. B. The signal is typical of a high radio card background noise. It shows that the card used for the Layer 1 sweep should be replaced and the Layer 1 sweep re- C. The signal is alternating between peaks (high interference level) and valleys (low interference level).
The network channel design must be
built to avoid the affected peak frequencies. D. The signal has a low duty cycle and should not be of major impact on the wireless network.

Correct Answer: D

Question 9

What type of standards-based encryption is used by office extension APs for the traffic tunnel?(Choose all that apply.) Response:

A. TKIP B. LWAPP C. DTLS D. CAPWAP E. AES

Correct Answer: C,D

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Question 10

When a WLAN controller sends an 802.11 frame to a lightweight AP for transmission on the wireless medium, how does it mark the frame for
802.11 QoS priority?

A. The WLAN controller does not mark 802.11 frames with priority values only the APs can do this. B. The WLAN controller does not mark the 802.11 frames with priority values only the Layer 3 switches can do this. C. The WLAN controller will place the user priority (UP) value in the QoS Control field of the 802.11 frame header before passing it to the lightweight AP. D. The WLAN controller does not mark the 802.11 frames with priority values only the Layer 3 routers can do this.

Correct Answer: C

Question 11

Excessive uplink RTP frame retransmissions can result in ____________.
Response:

A. Lowering of the data transmission rate by the transmitting station B. Deauthentication of the transmitter by the receiver C. MOS scores in excess of 5 D. Head-of-Line blocking at the receiver

Correct Answer: A

Question 12

You are using site software design features. You have imported a floor plan, but the simulated RF coverage is nowhere close to the real RF coverage you see with a walkabout.
Given that the simulation is significantly different, when step was likely missed when using the software?
Response:

A. Adding extra APs to simulate interference B. Calibration C. Conversion to PNG D. Conversion to DWG

Correct Answer: B

Question 13

During lunch time in the break room of a company, Wi-Fi connectivity on the 2.4 GHz band is intermittent.
Every other time of the day, it works fine.
What's the likely cause of this issue?

A. Toasters and ovens are heating up the air, raising the noise floor with the Wi-Fi on the 2.4 Ghz band B. Employees are using their cell data instead of using the Wi-Fi C. The AP in the cafeteria keeps rebooting due to lack of PoE budget on the switch D. Microwaves in the cafeteria are interfering with the Wi-Fi on the 2.4 GHz band

Correct Answer: D

Question 14

What differences exist between VLANs in wireless and wired domains?
Response:

A. Wireless VLANs are not an effective way to utilize a single set of infrastructure equipment to provide different services to different client groups. Wired VLANs are effective for this purpose. B. Wireless VLANs are not effective for segmenting the available services and network permissions available to clients. Wired VLANs are effective for this purpose. C. Wireless VLANs do not always segment traffic into separate broadcast domains on the wireless medium. Wired VLANs do segment broadcast domains on the wired network. D. Wireless VLANs are never carried in 802.11 frames that cross the wireless medium. VLAN identifiers are always carried in Ethernet frames to indicate the proper VLAN.

Correct Answer: C

Question 15

What statement is true of a WLAN design that supports Real-Time Location Services (RTLS) with 802.11 RFID asset tags?

A. With passive tags, AP transmit gain should be increased to supply extra power for near-field coupling or backscatter modulation from the tag to the AP since the passive tag lacks an internal power source. B. Passive tags do not communicate directly with the WLAN infrastructure, but instead they rely on the tag reader to communicate tag information to the C. Active RFID tags periodically transmit 802.11 beacon management frames that must be synchronized with the AP for proper location of the tagged asset. D. When passive tags are implemented, the AP density should be increased by 25% to make up for the shorter transmit range of passive tags as compared to active tags.

Correct Answer: B

CWNP Certified Wireless Design Professional - CWDP-304 Exam Practice Test