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Question # 4

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?

Response:

A.

Use a plastic cover that could blend in with the environment

B.

Lock the AP inside of a metal box

C.

Place the APs in between walls and I-beams

D.

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

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Question # 5

Before performing a pre-deployment passive RF survey of a new deployment using survey mapping software, which of the following must be performed?

A.

Determining AP transmit power

B.

Scaling the map

C.

Selecting antennas

D.

Checking client DTPC settings

Full Access
Question # 6

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

Response:

A.

Syslog analysis

B.

Network overview

C.

Engineering feedback

D.

Configuration backups

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Question # 7

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:

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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Question # 8

Who should be in the final meeting from the customer-side after successfully implementing a WLAN infrastructure?

A.

CEO or CFO

B.

End-users

C.

The customer's customers

D.

Remote workers

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Question # 9

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

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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Question # 10

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.)

Response:

A.

Signal degradation

B.

Packet loss

C.

Interference

D.

Retransmissions

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Question # 11

When designing a WLAN to support voice in a large office, which design element is of the highest concern for performance?

A.

Frequency Selection

B.

Roaming

C.

AP vendor

D.

Band steering

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Question # 12

What differences exist between VLANs in wireless and wired domains?

Response:

A.

Wireless VLANs are not effective for segmenting the available services and network permissions available to clients. Wired VLANs are effective for this purpose.

B.

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.

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 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.

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Question # 13

What VoWiFi implementations frequently require multicast packet delivery support by the WLAN infrastructure?

A.

All VoWiFi implementations

B.

Push-to-Talk VoWiFi phones

C.

All VoWiFi soft phones

D.

All VoWiFi hard phones

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Question # 14

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

Response:

A.

HLD, routing

B.

LLD, bridging

C.

LLD, routing

D.

HLD, QoS

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Question # 15

Left to its simplest form, what method does a location algorithm use to determine location within a WLAN coverage area?

Response:

A.

Inverse cube law

B.

FSPL

C.

RF fingerprinting

D.

802.11 clause 16

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Question # 16

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:

A.

handheld scanner

B.

tablet

C.

laptop

D.

USB 2.0 adapter

E.

mobile phone

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Question # 17

During a validation site survey, you realize that the installers mounted some of the APs above the ceiling. They said that this was a request from

the building architect due to aesthetics constraints. During the requirements gathering, you weren't advised about any aesthetics constraints from

the main stakeholder of the project. What should you do in this case?

A.

Advise the stakeholder that WLAN performance requirements will not be met and a new design process will be needed to meet the

requirements.

B.

Leave it as it is and allow automatic channel management to correct any issues.

C.

Increase the output power on all APs by 6 dB immediately.

D.

Remove all external antennas and use only the internal antennas to reduce multipath.

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Question # 18

An MSA commonly addresses at least which two legal categories?

Response:

A.

Nondisclosure agreement

B.

Hold harmless

C.

Intellectual property protection

D.

Indemnity clause

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Question # 19

When live video streaming solutions that transmit simultaneously to more than one recipient are used, what special capability should be considered and configured in all affected WLAN implementations?

Response:

A.

Secure TCP

B.

Multicasting

C.

IPv6

D.

IPSec

Full Access
Question # 20

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, 2

B.

1, 2, 3, 5

C.

1, 2, 3, 4, 6

D.

2, 3, 5

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Question # 21

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?

A.

Patch

B.

Dish

C.

Grid

D.

Low-gain dipole

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Question # 22

You are working on a VoWLAN design with your customer's wired networking team. How many distinct priority levels do you expect for the voice

applications?

A.

1 priority level, but 2 queues (one for uplink traffic, one for downlink traffic)

B.

1 priority level per client and AP pair, so the total number depends on the expected number of clients

C.

1 priority level for voice RTP, 1 priority level for voice control and RTCP

D.

1 priority level for VoWLAN client traffic, 1 priority level for wired VoIP client traffic

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Question # 23

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

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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Question # 24

During your first pre-deployment meeting with the deployment team, you hand out the full design documentation to all of them. What's your

primary goal during this meeting?

A.

To explain design decisions and ensure understanding of design documents.

B.

To discuss AP functionality.

C.

To explain how Wi-Fi works.

D.

To justify the budget.

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Question # 25

Modulation can be defined as:

Response:

A.

The process of incorporating a chipping code to build resilience

B.

The process of encoding data symbols using a carrier frequency

C.

The process of modifying a carrier signal to represent data

D.

The process of representing data using RF coding

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Question # 26

As you plan a WLAN upgrade, you have assessed the network requirements and data signatures of your applications. One of the popular

applications used on your network requires high bandwidth and low to medium Wi-Fi loss, but can tolerate moderate latency and jitter.

What application matches this description?

A.

Voice

B.

Email

C.

Skype chat

D.

Video-on-demand

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Question # 27

What is a radome?

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.

Full Access
Question # 28

An MSA commonly addresses at least which two legal categories?

A.

Nondisclosure agreement

B.

Hold harmless

C.

Intellectual property protection

D.

Indemnity clause

Full Access
Question # 29

Given: You are evaluating the theoretical and real-world RF gain benefits of transmit and receive features introduced by 802.11 with MIMO. This

exercise allows you to quantify the features value in a real-world environment.

What is the maximum theoretical signal gain of chip-based TxBF and MRC (as features) when compared to the same AP using only a single

antenna for transmit and receive (effectively simulating a 1x1 chip)?

A.

2 Rx or Tx chains = 3 dBi gain 3 Rx or Tx chains = approx 5 dBi gain 4 Rx or Tx chains = 6 dBi gain

B.

2 Rx or Tx chains = 1 dBi gain 3 Rx or Tx chains = 2 dBi gain 4 Rx or Tx chains = 3 dBi gain

C.

2 Rx or Tx chains = 3 dBi gain 3 Rx or Tx chains = 6 dBi gain 4 Rx or Tx chains = 9 dBi gain

D.

2 Rx or Tx chains = approx 4-6.5 dBi gain 3 Rx or Tx chains = approx 7-10 dBi gain

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Question # 30

Given: In a site survey deliverable report, you are expected to explain the spectrum measurements taken at the customers site. What portion of a

spectrum analyzer view can be used to determine if a given channel is too active for use as the active channel for a new AP?

A.

Device list

B.

Frame decode

C.

Real time FFT

D.

Duty cycle

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Question # 31

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

Response:

A.

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

B.

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

C.

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

D.

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.

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Question # 32

In a manufacturing facility with highly reflective materials, you are planning an upgrade to your existing 802.11b WLAN implementation. You have

chosen a dual- band 802.11n infrastructure product for this purpose. Your client applications include:

✑Handheld scanners for inventory management

✑Toughbooks (laptops) mounted on forklifts for inventory and workflow management

✑VoWiFi phones used by select employees throughout the facility

You are evaluating all of the 802.11n enhancements and determining which features to enable for your environment and applications.

In this scenario, what 802.11n enhancement typically should NOT be enabled on the 2.4 GHz radio of the new APs?

A.

Multiple streams

B.

Short guard intervals

C.

Block Acknowledgments

D.

Frame aggregation

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Question # 33

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?

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

Full Access
Question # 34

When surveying an existing WLAN infrastructure for a possible redesign, you use two Wi-Fi USB adapters to collect RSSI data and two USB

spectrum analysis adapters to collect RF spectrum data. Since your laptop doesn't have enough USB ports, you use a 4-port powered USB 3.0 hub.

What issues could be caused by the use of USB 3.0 that will impact your site survey?

A.

It does not give you enough bandwidth to collect data coming from all of the adapters.

B.

It does not give you enough power for all four of your adapters.

C.

It generates noise in the 2.4 GHz band, giving you a false perception of the noise floor.

D.

It generates noise in the 5 GHz band, giving you a false perception of the noise floor.

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Question # 35

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?

A.

EAP-FAST

B.

EAP-TTLS

C.

EAP-TLS

D.

LEAP

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Question # 36

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

Response:

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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Question # 37

If radar has reportedly been detected on your WLAN deployment, what bands would you consider avoiding?

Response:

A.

5 GHz UNII-2 and 2e

B.

5 GHz UNII-2 and 3

C.

5 GHz UNII-2, 2e, and 3

D.

5 GHz UNII-1 and 2

E.

5 GHz UNII-1, 2, and 3

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Question # 38

What differences exist between VLANs in wireless and wired domains?

Response:

A.

Wireless VLANs are not effective for segmenting the available services and network permissions available to clients. Wired VLANs are effective for this purpose.

B.

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.

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 ineffective for utilizing a single set of infrastructure equipment to provide different services to different client groups. Wired VLANs are effective for this purpose.

Full Access
Question # 39

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

A.

Hold Harmless

B.

Statement of Work

C.

Bill of Materials

D.

Physical installation guide

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Question # 40

What are the three biggest WLAN enterprise verticals?(Choose all that apply.)

Response:

A.

Education

B.

Warehouses

C.

Healthcare

D.

Office environments

E.

Retail

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Question # 41

After designing and deploying a WLAN infrastructure, you realized the CCI is causing poor performance in the 2.4 GHz band. Primarily, you've

designed the

WLAN for 5 GHz and 2.4 GHz as a best effort. You found out that the implementers didn't follow your guidelines when configuring the WLAN

infrastructure. What can you do to minimize as much as possible the CCI impact in the 2.4 GHz band?

A.

Add more APs to the infrastructure

B.

Increase the transmit power on all APs

C.

Turn-off 2.4 GHz radios on some APs

D.

Use all channels available in the 2.4 GHz band

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Question # 42

NicoCo is building a new facility and would like to install a WLAN for primary connectivity of all clients. The requirements are dual-spectrum 802.11n supporting voice and location tracking.

What type of pre-deployment survey should be performed?

Response:

A.

Passive, using optimized channels

B.

Active, using a voice handset

C.

Active, using a lowest common denominator client

D.

Predictive

E.

Passive, all channels

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Question # 43

When analyzing published competitive tests by equipment vendors, what items are the tests usually lacking?(Choose all that apply.)

Response:

A.

Client devices and configurations

B.

Audit by a third party

C.

Detailed test methodology

D.

Detailed configurations of each vendor’s equipment

Full Access
Question # 44

You are selecting external antennas for use in a bridge link deployment. What chart should you request from the antenna vendors to make an

accurate selection?

A.

mW to dBm conversion chart

B.

dBm to dB conversion chart

C.

Elevation chart

D.

Antenna coating chart

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Question # 45

HR/DSSS specifies the following PHY rates:

Response:

A.

6, 9, 12, 18, 24, 36, 48, 54

B.

1, 2

C.

1, 2, 5.5, 11

D.

MCS 1–15

Full Access
Question # 46

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 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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Question # 47

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:

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

Full Access
Question # 48

In a convention center, you have received complaints about the WLAN infrastructure. At this moment, the are only two APs in one auditorium. After

analyzing the situation, you determined that there are more client devices that the infrastructure was designed for. There are only two APs to

support more than 300 devices using the Wi-Fi at the same time. What should you do to make the Wi-Fi work as expected?

A.

Redesign the entire WLAN

B.

Quickly add more APs

C.

Upgrade the Ethernet connections to MultiGig

D.

Turn up the output power on the APs so that they can handle more clients

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Question # 49

What term refers to the security practice of obfuscating actual data from unintended receivers as the data crosses the transmission medium?

Response:

A.

Confidentiality

B.

Authentication

C.

Integrity

D.

Accounting

E.

Nonrepudiation

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Question # 50

What might limit the ability to locate 802.11 clients using a WLAN infrastructure without an 802.11 tag?(Choose all that apply.)

A.

Lack of 802.11k support

B.

When its radio is disabled

C.

When it is off

D.

RF channel selection

Full Access
Question # 51

Before performing a pre-deployment passive RF survey of a new deployment using survey mapping software, which of the following must be performed?

Response:

A.

Determining AP transmit power

B.

Scaling the map

C.

Selecting antennas

D.

Checking client DTPC settings

Full Access
Question # 52

Given: As the wireless network administrator for XYZ Company, you are planning to upgrade your aging wireless network infrastructure, as well as

some clients, to support 802.11ac. In your research, you have discovered that your new wireless client devices and infrastructure are 802.11ac,

WMM, and WMM-PS certified by the Wi-Fi Alliance. Some of your existing client devices are 802.11a/b/g devices that do not support WMM.

Given this information, what scenario is possible when your company's employees begin using both types of client devices on the new WLAN?

A.

All WMM-PS certified client devices will be prevented from utilizing WMM-PS features until all stations in use on the wireless medium are

WMM-PS certified.

B.

The WLAN infrastructure will set the dozing times of the WMM-PS certified client devices based upon their WMM access category, while the

non-WMM-PS client devices will continue to use PS-Poll frames.

C.

Performance and battery life will be inconsistent between WMM-PS and non-WMM-PS client devices when used with applications that

support WMM-PS.

D.

WMM-PS enabled APs will allow both WMM-PS and non-WMM-PS stations to use the trigger-and-delivery mechanism, but WMM-PS stationswil

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Question # 53

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

A.

In any stadium

B.

In any office complex

C.

In an airport

D.

In any home office

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Question # 54

Which operational plane would be responsible for performing automated RF management?

Response:

A.

Integration

B.

Data

C.

Distribution

D.

Control

E.

Management

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Question # 55

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:

A.

65 dB loss

B.

16 dB gain

C.

56 dB loss

D.

37 dB loss

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Question # 56

When live video streaming solutions that transmit simultaneously to more than one recipient are used, what special capability should be

considered and configured in all affected WLAN implementations?

A.

IPSec

B.

IPv6

C.

Multicasting

D.

Secure TCP

Full Access
Question # 57

Which of the following items could be considered constraints when performing a network design?(Choose all that apply.)

A.

Timeline

B.

Personnel

C.

Politics

D.

Budget

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Question # 58

The installation crew for your WLAN project wants to install a few APs to locations nearby the ones specified in the RF design document. What next step should occur?

Response:

A.

Confirm the mounting hardware.

B.

Choose a different AP model.

C.

Update the documentation.

D.

Consult the RF designer.

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Question # 59

While performing a validation site survey, you realize that overlapping channels are being used on the 2.4 GHz bad due to the automatic channel assignment algorithm of the WLAN infrastructure.

What should you do to prevent this?

A.

Reconfigure the network to use static channel plans because automatic channel assignment algorithms are all broken

B.

Purchase and deploy new APs from a different vendor

C.

Reconfigure the automatic channel assignment settings to use only channels 1, 6, and 11

D.

Leave it as it is; sometimes using all 11 channels in 2.4 GHz gives the optimum performance result

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Question # 60

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?

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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Question # 61

Location technology (RTLS) can use which of the following methods?(Choose all that apply.)

Response:

A.

Sound

B.

802.11-capable laptops

C.

Active RFID

D.

Infrared

E.

UHV

F.

UWB

G.

Passive RFID

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Question # 62

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:

A.

5 dBm

B.

2 dBm

C.

2 dB

D.

5 dB

Full Access
Question # 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?

A.

11 dBm

B.

6.25 mW

C.

125 mW

D.

17 dBm

Full Access
Question # 64

SSID hiding is not generally recommended because some frames require inclusion of the SSID. In what frames is the SSID always included?

Response:

A.

Beacon

B.

Association request

C.

Probe response

D.

Probe request

E.

Authentication response

Full Access
Question # 65

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

Response:

A.

Independent autonomous

B.

Centralized

C.

Cooperative autonomous

D.

Controller

E.

Distributed

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Question # 66

One of your warehouse customers called you reporting problems with their WLAN in some locations that you designed and installed over a year ago. What should be one of your first considerations for your line of questioning?

Response:

A.

DHCP lease exhaustion

B.

Changes in receive gain

C.

Inventory changes

D.

Rogue APs from neighbors

Full Access
Question # 67

What are some advantages of designing guest access with all guest users tunneled directly into the DMZ?

Response:

A.

Minimizes configuration requirements for segmentation and filtering of guest traffic across internal LAN

B.

Enhances performance of web proxy servers in the DMZ for guest Internet traffic

C.

Allows a single SSID with different authentication/encryption models to be used for all WLAN services for corporate users and guests

D.

The border firewall configuration will not require any additional rules to pass guest traffic to the DMZ controller

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Question # 68

A high power radio system transmits at 40,000 Watts. What is this power in dBm? Solve this without a calculator.

Response:

A.

46 dBm

B.

76 dBm

C.

56 dBm

D.

66 dBm

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Question # 69

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:

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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