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CWISA-102 Certified Wireless IoT Solutions Administrator Question and Answers

Question # 4

How does OFDMA differ from OFDM?

A.

Subcarriers of OFDMA can contain data destined for a different receiver

B.

OFDMA offers greater range by using multiple channels at once

C.

OFDMA allows multiple devices to transmit simultaneously on the same frequency

D.

OFDMA uses multiple radios to achieve higher throughput

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Question # 5

What factor severely limits the range of systems operating in the 60GHz band?

A.

Atmospheric Scattering

B.

Solar Radiation

C.

Rain Fade

D.

Oxygen Fade

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Question # 6

What process, used for security in wireless solutions, is defined as the encoding of information to prevent readability by unauthorized users?

A.

Access Control

B.

Authentication

C.

Encryption

D.

Authorization

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Question # 7

What is the primary difference between LoRa and LoRaWAN

A.

LoRa uses RF and LoRaWAN uses light-based communications

B.

LoRa is the modulation method (using CSS modulation at the Physical Layer) and LoRaWAN is the MAC sub-layer of the Data Link layer

C.

LoRa is the Physical Layer and LoRaWAN is the Transport Layer

D.

LoRa is used for communicating across the Internet and LoRaWAN is used only on the local link

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Question # 8

What is an important acceptance agreement to achieve in the final customer meeting for a wireless IoT deployment?

A.

Stakeholder acceptance

B.

Support for wearable IoT solutions

C.

Scope definition

D.

Power supply provisioning

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Question # 9

Which one of the following items has driven large serving 5- to 18-year-old students?

A.

Cloud-based applications

B.

Online torrent sites

C.

Streaming music

D.

Wearable body sensors

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Question # 10

As an RF signal propagates it becomes weaker at any given measurement point as it gets farther away from the transmitter. What concept is described?

A.

RF latency

B.

Free Space Path Loss

C.

Beamwidth

D.

Diffraction

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Question # 11

What is a valid reason to continue using older wireless networking technologies?

A.

The desire for faster communications

B.

The desire to support internal antennas

C.

The desire to use older encryption processes, which are faster regardless of the CPU implemented

D.

A requirement to support legacy devices

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Question # 12

When deploying devices in an indoor manufacturing environment, which IP rating is more likely to be required?

A.

IP47

B.

IP38

C.

IP46

D.

IP66

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Question # 13

What does the number in the various Quadrature Amplitude Modulation levels, such as 16 in QAM-16 and 64 in QAM-64, indicate? (Choose the single best answer.)

A.

The speed of data transfer,which is four times the number in the QAM level

B.

The channel width, which is stipulated in MHz

C.

The number of target points in the QAM constellation, which are equivalent to amplitude and phase combinations

D.

The number of spatial streams, which is 1/4 the number in the QAM level

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Question # 14

What modulation is used by LoRa?

A.

OFDMA

B.

CSS

C.

ASK

D.

OFDM

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Question # 15

What kind of PoE device can be used to power a non-PoE connected object assuming PoE power is provided on the Ethernet cable?

A.

PoE midspan injector

B.

PoE endspan switch

C.

PoE coupler

D.

PoE splitter

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Question # 16

What part(s) of the OSI network model does the IETF primarily focus on for the development of standards?

A.

Physical Layerand above

B.

All layers

C.

Network Layer and above

D.

Data Link Layer

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Question # 17

What is the role of the ITU in wireless communications?

A.

Defines international communications standards

B.

Oversees communications regulatory agencies in each country

C.

Coordinates the shared global use of the radio spectrum

D.

Establishes wireless radiation exposure limits

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Question # 18

You are considering the implementation of a lab for testing wireless equipment. What is the primary benefit of such a lab? (Choose the single best answer.)

A.

Provides for testing to determine how much RF exposure you can tolerate

B.

Provides a failover environment for your production systems

C.

Provides a way to repurpose old hardware that is not ready for final removal

D.

Provides a safe environment in which to develop practical skills and knowledge of a technology and to test the technology

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Question # 19

What primary component is required to implement a wireless transceiver in a device?

A.

GPIO pins

B.

SRAM

C.

Flash memory

D.

Radio

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Question # 20

What is the spacing between ZigBee channels when operating in the 2.4 GHz frequency band?

A.

25 MHz

B.

2 MHz

C.

5 MHz

D.

1 MHz

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