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CWDP-304 Certified Wireless Design Professional Questions and Answers

Questions 4

What commonly causes a client-to-AP link imbalance?

Options:

A.

The client's antenna gain is lower than the AP's antenna gain

B.

The client's transmit power is significantly lower than the AP's transmit power

C.

The AP's transmit power is significantly lower than the client's transmit power

D.

The AP's antenna gain is lower than the client's antenna gain

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Questions 5

What best describes ensuring coverage requirements in a deployed WLAN?

Options:

A.

Measuring the signal strength and number of APs at each location and comparing it to the requirement specifications

B.

Verifying that the WLAN can be seen from all required locations

C.

Verifying that you can connect to the WLAN from all required locations with the least capable device

D.

Verifying that a 3x3:3 gaming laptop can connect to the WLAN from all required locations

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Questions 6

When deploying APs outdoors, what additional component needs to be used that is not needed indoors?

Options:

A.

Antennas

B.

NEMA enclosures

C.

Ethernet cables

D.

PoE

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Questions 7

What frequency and power did 802.11y provide?

Response:

Options:

A.

3.65–3.7 GHz, 20W EIRP

B.

5.65–5.7 GHz, 5W EIRP

C.

5.25–5.35 GHz, 10W EIRP

D.

3.7–3.75 GHz, 15W EIRP

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Questions 8

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?

Options:

A.

Because neither of the technologies support data rates over 1Gbps

B.

Because 802.11ax doesn't support channel bonding

C.

Management overhead that is normal in WLANs will reduce the throughput of the client devices

D.

Because 802.11ac only supports one spatial stream

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Questions 9

What is the DSCP Per Hop Behavior equivalent classification of the 802.11 AC_VO priority level?

Options:

A.

AF31

B.

CS3

C.

VO

D.

EF

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Questions 10

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

Response:

Options:

A.

CAPWAP

B.

LWAPP

C.

TKIP

D.

AES

E.

DTLS

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Questions 11

What important item is often left out of operational and maintenance plans?

Response:

Options:

A.

Syslog analysis

B.

Network overview

C.

Engineering feedback

D.

Configuration backups

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Questions 12

What advantages are provided by per-user PSKs when compared with ESS-wide PSKs?(Choose all that apply.)

Response:

Options:

A.

Per-user PSKs allow easier user-based access control with WPA/WPA2-Personal security.

B.

Per-user PSKs are easier to manage if a PSK is compromised or an employee leaves a company.

C.

Per-user PSKs are standardized and certified by the Wi-Fi Alliance.

D.

Per-user PSKs are more secure than ESS-wide PSKs because they support mutual authentication.

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Questions 13

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?

Options:

A.

The signal affects the entire spectrum and will render the wireless network unusable. It must be located and removed.

B.

The signal has a low duty cycle and should not be of major impact on the wireless network.

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 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-

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Questions 14

A table of VLANs in a _________ document should include what device performs ________ services.(Fill in the blanks)

Response:

Options:

A.

HLD, routing

B.

LLD, bridging

C.

LLD, routing

D.

HLD, QoS

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Questions 15

As a device starts to shift to lower PHY rates, what factors usually influence a device decision to shift to lower PHY rates?(Choose all that apply.)

Options:

A.

Signal degradation

B.

Packet loss

C.

Interference

D.

Retransmissions

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Questions 16

Name the audience type not addressed in this chapter for HLDs.

Response:

Options:

A.

Operations

B.

Executives

C.

Designers

D.

Engineering

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Questions 17

Excessive uplink RTP frame retransmissions can result in ____________.

Options:

A.

Deauthentication of the transmitter by the receiver

B.

Lowering of the data transmission rate by the transmitting station

C.

MOS scores in excess of 5

D.

Head-of-Line blocking at the receiver

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Questions 18

What action should be taken after implementing a WLAN based on the design developed from the site survey process?

Options:

A.

Post-installation survey

B.

Requirements analysis

C.

Gathering facility documentation

D.

Design the infrastructure services

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Questions 19

Your customer is using PSK as their only authentication. They have an industry requirement to move to a stronger solution. Your recommendation

is to move to a certificate-based type of authentication where both the client and server require certificates. Which EAP type would be the best fit?

Options:

A.

EAP-FAST

B.

EAP-TTLS

C.

EAP-TLS

D.

PEAP

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Questions 20

After deploying a 5 GHz-only WLAN infrastructure in the USA, using 20 MHz channel-widths and all 25 available channels, one of the managers of

the company brings his 802.11n tablet to the office to test the Guest SSID. While testing, there were several spots where we would get poor RSSI

(below -80dBM) or none at all. You checked the WLAN infrastructure and all APs are up and running and you've validated coverage after

deployment. What is causing this issue?

Options:

A.

His tablet doesn't support the 5 GHz band

B.

His tablet only supports a 40 MHz channel-width

C.

His tablet does not support one or more of the 5 GHz channels

D.

His tablet doesn't support MU-MIMO

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Questions 21

In what circumstance would you not enable DFS channels on a WLAN infrastructure?

Options:

A.

In any stadium

B.

In any office complex

C.

In an airport

D.

In any home office

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Questions 22

In most WLAN design tools, after defining project parameters or during the project creation wizard what action will you take before you can begin the actual design process?

Options:

A.

Place APs

B.

Define cabling

C.

Import a floor plan

D.

Define wall materials

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Questions 23

What are the two most common industry-standard protocols used to transport data from an AP to a Wireless LAN Controller?

Options:

A.

CAPWAP and GRE

B.

LWAPP and FTP

C.

SSL and SSH

D.

TLS and SSL

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Questions 24

What is the meaning of a Real Time FFT graph?

Options:

A.

Real Time FFT means Real Time First Fundamental Trace and shows the value of the first signal detected on each frequency at each sweep

interval.

B.

Real Time FFT means Real Time Fast Frequency Timing and shows the RF pulses measured by the Layer 1 sweep tool.

C.

Real Time FFT means Real Time Fast Fourier Transform and shows the max value of the signal detected on each frequency in real time.

D.

Real Time FFT means Real Time Frequency Fundamental Texture and shows the value of the noise background generated by the card used

to perform the

E.

Real Time FFT means Real Time Fast Fourier Transform and shows the max value of the signal detected on each frequency in real time.

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Questions 25

What is the purpose of Friis transmission equation [ (LdB) = 20 log(d) + 20 log (f) - 27.55 ]?

Options:

A.

Calculate earth bulge to determine minimum antenna height

B.

Calculate receive sensitivity for an 802.11 radio/antenna pair

C.

Calculate RF path loss in free space

D.

Calculate the loss experienced between the intentional radiator and antenna

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Questions 26

What is the most suitable antenna option to be used when designing a WLAN infrastructure with APs mounted on a ceiling with a height of more than 20 feet and having all of the client stations used from the floor?

Response:

Options:

A.

Patch

B.

Dish

C.

Low-gain dipole

D.

Grid

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Questions 27

How much more power can a 1 Mbps 802.11b signal have than a 54 Mbps 802.11g signal if it is sent through a saturated amplifier?

Response:

Options:

A.

5 dBm

B.

2 dBm

C.

2 dB

D.

5 dB

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Questions 28

What document should be created that provides instructions for install technicians to mount and configure APs?

Options:

A.

Hold Harmless

B.

Statement of Work

C.

Bill of Materials

D.

Physical installation guide

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Questions 29

What is the most suitable antenna option to be used when designing a WLAN infrastructure with APs mounted on a ceiling with a height of more

than 20 feet and having all of the client stations used from the floor?

Options:

A.

Patch

B.

Dish

C.

Grid

D.

Low-gain dipole

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Questions 30

What is an advantage of centralized data forwarding?

Options:

A.

It reduces delay for user traffic

B.

It increases the encryption strength for user traffic

C.

It increases the signal strength for wireless client devices

D.

It allows for centralized filtering of wireless traffic

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Questions 31

You have been tasked with performing safety and operations training for outdoor bridge link installation. The antennas are to be installed on a 70-foot tower on one end and the roof top of an office building on the other end.

What might be required for the tower installation?

Response:

Options:

A.

Hiring a certified tower installer.

B.

Special antennas that avoid reflections on the tower poles.

C.

APs that are designed to operate above 70 feet.

D.

Special RF cables that will not create loss incurred by the metal tower construction.

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Questions 32

What kind of site survey helps you identify if roaming is working as designed?

Options:

A.

Passive

B.

Predictive

C.

Active

D.

Spectrum analysis walkthrough

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Questions 33

After designing a WLAN infrastructure using predictive design software. What's the best way to validate the predictive design in the physical space

before deployment, if time and budget allow for it?

Options:

A.

Deploy all of the APs as they're shown in the predictive design and perform an active site survey.

B.

Deploy all of the APs as they're shown in the predictive design and perform a passive site survey.

C.

Use a client device positioned where the APs will be installed and measure the signal from the client device.

D.

Perform an AP-on-a-Stick survey using AP locations based upon the predictive design to confirm each AP's placement.

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Questions 34

For what purpose is SSID hiding generally useful?(Choose all that apply.)

Response:

Options:

A.

Preventing guests from attempting to join the secured corporate network

B.

Obscuring the network name from potential attackers

C.

Minimizing help desk calls from users and guests attempting to join the wrong network

D.

Preventing legitimate corporate users from finding the guest network

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Questions 35

What architecture suffers the biggest limitation for sharing control information across APs?

Response:

Options:

A.

Independent autonomous

B.

Centralized

C.

Cooperative autonomous

D.

Controller

E.

Distributed

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Questions 36

You are testing a VoWLAN deployment, and your communication measurements show a certain amount of lost packets. What would be an

acceptable packet error rate value to still provide acceptable call quality?

Options:

A.

There should be 0% error in a VoWLAN type of deployment

B.

No more than 1% PER max should be acceptable

C.

No more than 4% PER max should be acceptable

D.

No more than 8% PER max should be acceptable

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Questions 37

Which type of authentication and encryption method is mandatory for Voice Enterprise certified devices as specified by the Wi-Fi Alliance?

Options:

A.

WPA2/AES Personal

B.

WPA2/TKIP Enterprise

C.

WPA2/AES Enterprise

D.

WPA/TKIP Personal

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Questions 38

What should always be done before connecting an AP to the production network?

Response:

Options:

A.

Baseline configuration that prevents the introduction of security issues to the network on initial connection.

B.

Disabling SSID broadcasting.

C.

Reduction of output power.

D.

Increase in output power.

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Questions 39

Which one of the following is an essential metric to measure when performing a survey and design for VoIP across WLANs?

Options:

A.

Throughput rates above 50 Mbps

B.

Data rates above 100 Mbps

C.

Latency

D.

PoE provided to wireless handsets

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Questions 40

Why does a frame transmitted at 1 Mbps have a greater usable range than the same frame transmitted at 54 Mbps?

Options:

A.

Free space path loss causes greater signal dispersion for higher rate transmissions.

B.

Receiver sensitivity requirements are lower for frames transmitted with less complex modulation and coding.

C.

To improve reliability, 802.11 STAs increase transmit power as the signaling rate decreases.

D.

Lower data rate RF transmissions travel at higher speeds and are less likely to experience collisions.

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Questions 41

For what purposes are VPNs typically used in modern WLANs?(Choose all that apply.)

Response:

Options:

A.

Remote AP tunneling to a corporate WLAN controller or VPN concentrator

B.

Client device connectivity to corporate resources from unsecured public networks

C.

Initial 802.11 authentication with the AP and subsequent data encryption

D.

Tunneling APs and WLAN controllers to cloud-based management platforms

E.

Tunneling APs and WLAN controllers to RADIUS and token servers

F.

Bridging client connectivity in ad hoc networks

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Questions 42

When deploying a new WLAN infrastructure using PoE to power the APs, you realize that a known good AP is not powering up. You use the same

cable to connect your laptop and connect without any trouble. What is the most likely reason the AP did not power up?

Options:

A.

Missing AP licenses in the controller

B.

Spanning-tree convergence

C.

Layer 3 routing

D.

Lack of PoE budget on the switch

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Questions 43

You have been asked to design a WLAN for an organization. They will be replacing an existing WLAN Currently each AP operates 8 SSlDs on each radio What will you communicate with the organization so that they understand the need to reduce the number of SSlDs?

Options:

A.

implementing loo many SSIDs results in decreased data rates

B.

Implementing loo many SSIDs results in decreased throughput

C.

Implementing loo many SSIDs increases ACl in every scenario

D.

Implementing too many SSIDs reduces SNR in every scenario

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Questions 44

When selecting a centralized WLAN architecture, what new problem may arise when you change the data forwarding model from centralized to

distributed?

Options:

A.

APs that were designed for a centralized forwarding model may not support all features in distributed forwarding mode.

B.

The router between the APs and the controller must be made aware of the APs as forwarding client STAs.

C.

All RRM controls will also need to be distributed to a master AP that acts as a channel and transmit power arbiter for other APs in the ESS.

D.

Centralized control functions, such as key management and distribution, RRM, and load balancing will no longer be supported.

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Questions 45

Your customer requires a security solution in which client credentials are used and the authentication server must have a certificate with optional

client certificate use. Which EAP method would be the best fit for their requirement?

Options:

A.

EAP-FAST

B.

EAP-TTLS

C.

EAP-TLS

D.

LEAP

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Questions 46

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?

Response:

Options:

A.

Employees are using their cell data instead of using the Wi-Fi

B.

The AP in the cafeteria keeps rebooting due to lack of PoE budget on the switch

C.

Microwaves in the cafeteria are interfering with the Wi-Fi on the 2.4 GHz band

D.

Toasters and ovens are heating up the air, raising the noise floor with the Wi-Fi on the 2.4 Ghz band

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Questions 47

An associated STA detects a new BSS with the same SSID as the STA's current BSS. The new BSS uses a different IP subnet than the current BSS.

If the STA is configured to use 802.1X/EAP preauthentication, what is likely to occur?

Options:

A.

The STA will not attempt to preauthenticate because the new BSS uses a different IP subnet.

B.

The STA will attempt to preauthenticate, but fail because the new BSS uses a different data-link broadcast domain.

C.

The STA will attempt to preauthenticate and succeed if DHCP is supported on the new subnet.

D.

The STA will attempt to preauthenticate and succeed if IP Mobility is enabled on the AP or WLAN controller.

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Questions 48

What is the primary reason for avoiding 160 MHz channels with 802 11 in the 5 GHz band'?

Options:

A.

Only two oi three 160 MHz channels exist in the current frequency allocation, tn some regulatory domains only one exists

B.

The data rate becomes too high which causes some clients to gam access to the medium and never let it go

C.

The output power requited for 160 MHz channels is more than most regulatory domains allow

D.

No APs exist in production that can implement 160 MHz channels

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Questions 49

Given A project parameter defines a requirement or constraint (or a project that can be defined before any file imports or design actions. What is an example of a project parameter commonly available in WLAN design software?

Options:

A.

AP locations

B.

Minimum required signal strength

C.

AP type selection

D.

Floor plan

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Questions 50

What is a radome?

Options:

A.

A type of semi-circular ceiling found in atriums and that is a heavy cause of RF reflection.

B.

A weatherproof piece of plastic covering an antenna or antenna system.

C.

The unit used to measure the signal reflected backward by the end of a cable.

D.

A piece of metal positioned behind APs mounted on outdoor poles, designed to limit the butterfly effect.

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Questions 51

In addition to a copy of your design, which tools should you use to ensure the installation team deploys APs where you have them designed to be

located?

Options:

A.

GPS and a map

B.

RF spectrum analyzer and packet capturing software

C.

Ladder and a pen

D.

Camera and marking tools

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Questions 52

When preparing a floor plan graphic for use in predictive and manual site surveying, what calibration method will lead to the most accurate and

reliable RF data?

Options:

A.

Use the known size of a small object, such as a ceiling tile, and use a single instance of this object (e.g. a single ceiling tile) to scale the

floor plan.

B.

Measure the width of an actual office doorway with a tape measure and use this value to calibrate against a doorway graphic.

C.

Use the longest available measurement (like a straight exterior wall) to calibrate the graphic's scale.

D.

Calibrate the ceiling height of the floor plan first, then the survey software should be able to auto-calibrate the X and Y planes of the

graphic.

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Questions 53

What kind of applications has the character traits of many communications back and forth between the server and client for each transaction initiated by the user?

For example, several files, images and other data files may be required to download to the client with each click from the user. Choose the best answer.

Response:

Options:

A.

mobile apps

B.

console management interfaces

C.

high-data bandwidth application

D.

real-time application

E.

web-based application

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Questions 54

You are planning for client devices in a WLAN that is be upgraded to 802.11ac. Which one of the following devices is more likely to have support for 3x3:3 radios and 256 QAM?

Response:

Options:

A.

handheld scanner

B.

tablet

C.

laptop

D.

USB 2.0 adapter

E.

mobile phone

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Questions 55

When installing APs on high ceilings, what should be the most common PPE to be used?

Options:

A.

Hardhat, high visibility vest and body belt

B.

Glasses, gloves and jacket

C.

Clean suits, masks and glasses

D.

Clean suits, gloves and jacket

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Questions 56

To increase capacity in a coverage-based wireless network, which of the following techniques are typically recommended?(Choose all that apply.)

Response:

Options:

A.

Maximize airtime usage by disabling lower data rates.

B.

Add additional APs and use directional antennas.

C.

Turn up power on the access points.

D.

Lower power on the access points and, after careful planning, add more AP

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Questions 57

What is the chip rate of 1 Mbps 802.11b?

Response:

Options:

A.

11 Mchips/s

B.

2 Mchips/s

C.

1 Mchip/s

D.

22 Mchips/s

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Questions 58

You are designing a WLAN and nave been asked to recommend a security solution for the network The organization requires that 802 1X/EAP be implemented, but they do not have a PKI and do not wish to deploy one They suggest that mostly Windows clients. Apple phones and Android phones will be used What do you recommend?

Options:

A.

Use CCMP AES with a PSK

B.

Use EAP-PEAP for the authentication solution

C.

Use FAP-TLS for the authentication solution

D.

Use TKIPRC4 with a PSK

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Questions 59

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:

Options:

A.

The APs are still using the 5 GHz lower band

B.

The clients were not upgraded

C.

APs are mounted on the wall

D.

APs are transmitting at a low transmit power

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Questions 60

ABC Manufacturing has a heavily-used dual-band (2.4 / 5 GHz) WLAN, but sporadic RF interference across the 2.4 GHz band is causing dropped

VoWiFi calls and leading to data connectivity and throughput problems.

In addition to avoiding 2.4 GHz channels and installing a distributed spectrum analyzer to locate RF interference sources, what should the

implementer do to resolve the problem fully?

Options:

A.

Have only guest access on the 5 GHz channels.

B.

Move all corporate data clients and VoWiFi devices to the 5 GHz channels appropriate for their regulatory domain.

C.

Use captive portals for guest authentication in 5 GHz.

D.

Implement WPA-PSK everywhere in the network.

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Questions 61

A cable with 2.5 dB of loss is used to measure the return loss of an antenna. The measured value in-band is shown to be larger than 20 dB. What is the actual return loss of the antenna, and is it considered to be a reasonable value?

Response:

Options:

A.

Larger than 15 dB and yes

B.

Larger than 15 dB and maybe

C.

Larger than 17.5 dB and yes

D.

Larger than 17.5 dB and no

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Questions 62

What is the best method of gathering attenuation measurements from any building materials or objects?

Options:

A.

After measuring the RSSI in free space 5 meters (16.5 feet) apart, put an AP 4 meters (13 feet) away from the wall or object on one side

and your measuring device 0.67 meters (2 feet) away from the wall or object on the other side. Take measurement and compare the

difference.

B.

Use the pre-built attenuation values in the predictive design tool.

C.

After measuring the RSSI in free space 1 meter (3 feet) apart, put an AP 0.32 meters (1 feet) away from the wall or object on the other side.

Take measurements and compare the difference.

D.

Look on the Internet for attenuation values for each one of the materials that might attenuate the Wi-Fi signal using the material provider's

websites.

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Questions 63

When using a predictive design tool, you have selected APs with an antenna gain 3 dBi and set the transmit power of the predicted APs to 25 mW.

What should be EIRP of the APs in the design?

Options:

A.

11 dBm

B.

6.25 mW

C.

125 mW

D.

17 dBm

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Questions 64

What factors are key features when designing a guest network for a large enterprise?(Choose all that apply.)

Response:

Options:

A.

802.11n

B.

Rate limiting

C.

802.1X security

D.

Traffic tunneling or anchoring

E.

SSID segmentation

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Questions 65

You have determined the best mounting locations for APs in a given installation. The facilities manager has asked you to change the locations for

several APs due to aesthetic concerns. You suggest mounting the APs in the ideal locations and painting them so they go unnoticed in the

environment.

What is a valid recommendation or consideration when painting APs?

Options:

A.

Always use paints with metallic dye in them to prevent potential RF propagation impact.

B.

Painting APs will significantly reduce the output power.

C.

Painting APs may void the product manufacturer's warranty.

D.

Most AP models for indoor environments come in a variety of form factors and colors. Painting is never recommended.

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Questions 66

Looking at a client radio specification sheet that states Receive Sensitivity of −82 dBm @ 18 Mbps would mean:

Response:

Options:

A.

It would need to hear a signal <−82 dBm in order to use the 24 Mbps PHY rate.

B.

It is only capable of transmitting at 18 Mbps PHY rates at −82 dBm.

C.

It must hear a signal >−82 dBm in order to demodulate the 18 Mbps PHY rate.

D.

It must hear a signal <−82 dBm in order to demodulate the 18 Mbps PHY rate.

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Questions 67

An AP vendor being considered for a WLAN deployment suggests that their 2 4 GHz and 5 GHz dual-band APs use software defined radios What unique capability does this indicate in comparison to non-software defined radios?

Options:

A.

At least one radio can be configured for either 2 4 GHz or 5 GHz operations

B.

The radios can have their SSlDs configured through software

C.

Software is used to configure the encryption settings

D.

Software is used to configure the entire WLAN profile

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Questions 68

You have performed a validation site survey after deploying a WLAN infrastructure that is an All-Wireless-Office. One specific application of your

customer is experiencing delay when using the application after moving from wired connectivity. After your validation, you realized that all APs are

using 80 MHz channel- widths instead of 20 MHz on the 5 GHz band, as it was designed. What can be done to resolve the delay on this

application?

Options:

A.

APs should be using 160 MHz channel-widths to get more throughput

B.

Reconfigure to use 20 MHz channel-widths, so reuse of the frequency is more effective

C.

Power-off half of the APs to reduce CCI and keep 80 MHz channel-widths

D.

Add more APs using 80 MHz channel-widths

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Questions 69

When designing a static channel plan for an office using voice devices near an airport, which range of channels should be avoided to ensure

optimal performance when implemented?

Options:

A.

36-40

B.

44-48

C.

116-124

D.

1-11

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Questions 70

After importing a floor plan to a predictive design tool, what should be done prior to adding APs, antennas and attenuators (e.g., walls)?

Options:

A.

Set the transmit power for all APs

B.

Add pictures of the environment

C.

Nothing; just begin by adding APs, antenna and attenuators

D.

Calibrate the floor plan to increase accuracy

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Questions 71

The thermal noise is at −174 dBm/Hz. A spectrum analyzer has a resolution bandwidth of 1 kHz and a 5 dB noise figure. What is the level of the noise floor?

Response:

Options:

A.

−174 dBm

B.

−139 dBm

C.

−144 dBm

D.

−204 dBm

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Questions 72

What is the purpose of defining wall materials in WLAN design software?

Options:

A.

To ensure the attenuation and reflection of the materials die considered during propagation modeling

B.

So that the floor plan looks as much like the target deployment space as possible

C.

It adds color to the floor plan which makes it easier to identify requirement areas

D.

Manager require it, so WLAN designers should do it.

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Questions 73

When using a predictive design tool, you have selected APs with an antenna gain 3 dBi and set the transmit power of the predicted APs to 25 mW. What should be EIRP of the APs in the design?

Response:

Options:

A.

17 dBm

B.

125 mW

C.

11 dBm

D.

6.25 mW

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Questions 74

You're about to deploy an Enterprise-class VoWLAN infrastructure. You need to ensure that QoS is properly configured throughout the network.

What Access

Category (AC) should voice frames/packets use?

Options:

A.

AC_VI

B.

AC_VO

C.

AC_BE

D.

AC_BK

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Questions 75

In your company’s WLAN, you expect to have a mixed client PHY environment and plan to use protection mechanisms. The protection mechanism used by your client devices is configurable.

What is the best protection mechanism for backward compatibility of 802.11n devices with 802.11b devices?

Response:

Options:

A.

WMM Protection

B.

SMPS

C.

CTS-to-Self

D.

Dual-CTS

E.

RTS/CTS

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Questions 76

A customer wants to deploy a WLAN that employs centralized forwarding. What LAN requirements should you look for?

Response:

Options:

A.

High-speed Ethernet links

B.

Layer 3 at the access layer

C.

Layer 2 at the distribution layer

D.

Routing redundancy protocol

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Questions 77

Given: A WLAN controller is connected to ABC Company's core layer 3 Ethernet switch with an IEEE 802.1Q trunk connection. The WLAN

controller's native

VLAN is VLAN 6 and its IP address is 10.0.14.2 /24. Lightweight APs supporting centralized forwarding are connected to the network on VLANs 7,

8, and 9, and they each build a Layer 3 tunnel back to the WLAN controller's IP address.

The dynamically assigned IP addresses received by each AP from a DHCP server will be ________________.

Options:

A.

Associated with the VLAN on which they are connected.

B.

Associated with the native VLAN of the WLAN controller.

C.

Associated with VLAN 1, the default VLAN for new APs

D.

Associated with a non-routable VLAN until the MAC address of the AP is removed from the controller's MAC filter

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Questions 78

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?

Options:

A.

Employees are using their cell data instead of using the Wi-Fi

B.

The AP in the cafeteria keeps rebooting due to lack of PoE budget on the switch

C.

Toasters and ovens are heating up the air, raising the noise floor with the Wi-Fi on the 2.4 Ghz band

D.

Microwaves in the cafeteria are interfering with the Wi-Fi on the 2.4 GHz band

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Questions 79

A signal passes through a 10-meter cable, an amplifier, and then a filter. The amplifier has an output that is eight times higher in power than its input. Each meter of cable reduces the signal level by a factor of 4. The filter has a loss of 5 dB.

What is the total loss/gain of the three elements in series?

Response:

Options:

A.

65 dB loss

B.

16 dB gain

C.

56 dB loss

D.

37 dB loss

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Questions 80

A museum wants to offer Wi-Fi to its visitors. One of their requirements is to have the APs blend into the design of the museum. What should you

do to meet this requirement?

Options:

A.

Lock the AP inside of a metal box

B.

Place the APs in between walls and I-beams

C.

Use an 802.11b AP, so it looks old enough to be in a museum

D.

Use a plastic cover that could blend in with the environment

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Questions 81

What limitation exists when WMM is not enabled on an 802.11n WLAN?

Response:

Options:

A.

The maximum channel-width will be 20MHz

B.

Only two ACs will be available

C.

EDCA values will change

D.

802.11 QoS will not be available

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Questions 82

ABC Company has a WLAN controller with 10 controller-based APs; the Voice SSID is configured for centralized data forwarding. Each AP is

connected to an access port on a layer-2 Ethernet switch. Each layer-2 switch is uplinked to a single layer-3 core Ethernet switch. The WLAN

controller is connected directly to the layer-3 core Ethernet switch. Layer-3 tunnels are created between all controller-based APs and the WLAN

controller. A voice server is connected to the layer-3

Ethernet switch.

When a voice-enabled QoS STA sends an IP data packet to a voice server in this scenario, the DSCP value carried in the STA's IP data packet gets

mapped to what and by which device?

Options:

A.

The DSCP value is mapped to an IEEE 802.1Q priority tag value by the WLAN controller.

B.

The DSCP value is mapped to the DSCP value in the encapsulating IP header by the layer-3 switch.

C.

The DSCP value is mapped to an IEEE 802.1p (802.1D-2004) UP value by the access point.

D.

The DSCP value is mapped to an IEEE 802.1Q VLAN tag by the access point.

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Questions 83

When doing some frame capturing over the air during a voice call, you realized that frames on the downlink (from the AP to the client) direction are

not being transmitted with the correct UP value for voice frames, but on the uplink (from the client to the AP) direction are being transmitted

correctly. What's the cause of this issue?

Options:

A.

Bad client driver

B.

AP is not receiving enough PoE, thus not using QoS features

C.

Somewhere on the wired network QoS markings aren't being trusted

D.

Faulty antenna on the AP

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Questions 84

Which definition correctly describes the "local MAC" variation of the centralized WLAN architecture?

Options:

A.

All MAC functions are performed by the AP. A minimal subset of network control is offloaded to the WLAN controller along with

management and monitoring functions.

B.

PHY functions are performed directly by the AP. MAC functions are divided almost equally between the WLAN controller and the AP,

according to the time sensitivity of the feature or service.

C.

The AP provides the RF termination point for the WLAN, but performs very few of the WLAN functions or services. The WLAN controller

performs all MAC functions and the AP is very simple and lightweight.

D.

All RF-, data-, and control-related WLAN functions are performed by the AP. APs coordinate network services with one another and are

managed by a WNMS,

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Exam Code: CWDP-304
Exam Name: Certified Wireless Design Professional
Last Update: Nov 23, 2024
Questions: 281

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