CWNP CWISA-102 CWISA Exam Questions Instant Access

Question 1

How does OFDMA differ from OFDM?

ASubcarriers of OFDMA can contain data destined for a different receiver

BOFDMA offers greater range by using multiple channels at once

COFDMA allows multiple devices to transmit simultaneously on the same frequency

DOFDMA uses multiple radios to achieve higher throughput

Answer : C

OFDM vs. OFDMA:

OFDM (Orthogonal Frequency-Division Multiplexing):Divides a channel into multiple subcarriers for data transmission.

OFDMA (Orthogonal Frequency-Division Multiple Access):Extends OFDM by allowing multiple users to share subcarriers simultaneously, improving efficiency and spectral utilization.

References

OFDM:https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing

OFDMA:https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiple_access

Question 2

What is a common characteristic of Industrial IoT (IIoT) devices that is not a characteristic of all IoT devices?

ARuggedized devices constructed for operating in harsh environments

BUse of standardized protocols

CTransmission of small amounts of data throughout the day

DUse of proprietary protocols

Answer : A

IIoT Environments:Industrial IoT (IIoT) often involves deployment in harsh environments (factories, plants, outdoor sites) with:

Extreme temperatures

Dust & Vibrations

Exposure to chemicals or moisture

Ruggedization:IIoT devices are designed to withstand these conditions, ensuring reliability and longevity.

References

IIoT:https://en.wikipedia.org/wiki/Industrial_Internet_of_things

Rugged Devices:Articles on ruggedized electronics will emphasize their importance in industrial settings.

Question 3

A Wi-Fi enabled weight scale is an example of what kind of health IoT device?

Aimplantable

Bwearable

Cnon-wearable

Dinjectable

Answer : C

Health IoT Device Categories:

Wearable:Devices worn on the body (smartwatches, fitness trackers).

Non-wearable:Devices used without being worn (smart scales, connected medical equipment).

Implantable:Surgically inserted devices (pacemakers, glucose monitors).

References

Health IoT:Resources on healthcare + IoT will illustrate device types.

Question 4

How is ASK modulation different from FSK modulation?

AASK varies the amplitude of the signal while FSK shifts its frequency

BFSK is more sensitive to noise than ASK

CASK does not work at high frequencies

DASK can carry more data than FSK

Answer : A

Key Modulation Differences:

ASK (Amplitude Shift Keying):Digital data is represented by changes in the amplitude (strength) of a carrier wave.

FSK (Frequency Shift Keying):Digital data is represented by changes in the frequency of a carrier wave.

References

ASK:https://en.wikipedia.org/wiki/Amplitude-shift_keying

FSK:https://en.wikipedia.org/wiki/Frequency-shift_keying

Question 5

Which one of the following location tracking technologies is most energy efficient in typical implementations?

ABLE Beacons

BCellular

CGPS

DWi-Fi

Answer : A

BLE Beacon Power Efficiency:Bluetooth Low Energy (BLE) beacons are designed for low power consumption.Their primary function is to periodically broadcast short data packets (advertising their presence).

Other Technologies:

Cellular:More power-hungry due to long-range communication and complex protocols.

GPS:Power intensive,especially when actively tracking location.

Wi-Fi:

Question 6

You are implementing a smart office wireless solution for a small business. The business owner indicates that It is acceptable to use consumer-targeted wireless devices. What is a common negative attribute of consumer-targeted smart home or smart office devices?

AThey rarely support features required for small business deployment

BThey often operate only in the 2.4 GHz frequency band used by 802.11 devices

CThey typically only support FHSS modulation schemes

DThey usually stop working after twelve months

Answer : B

Consumer Smart Devices Limitation:Many consumer-oriented smart devices are designed for simplicity and cost-effectiveness, leading to reliance on the crowded 2.4 GHz band.

Consequences:

High Interference:Increased potential for interference from Wi-Fi and other 2.4 GHz devices.

Limited scalability:Performance and reliability may degrade in busy wireless environments.

Question 7

You must ensure proper security controls are in place for a wireless solution. The solution allows for the use of groups to grant access to resources and capabilities. What is the term used to describe a situation where an individual is granted more access than required because of inclusion in a group?

AImproper delegation

BPrivilege escalation

CPrivilege creep

DImproper grouping

Answer : C

Privilege Creep Defined:Gradual accumulation of excessive permissions over time, often due to users changing roles or access needs not being adjusted accordingly.

Other Terms:

Privilege Escalation: A malicious act of obtaining higher-than-authorized access.

Improper Delegation/Grouping: Faulty permission assignment, but not the gradual accretion aspect.

References:

Principle of Least Privilege:Security best practice emphasizing the need to minimize access to only what's necessary.

Access Control Models:Discussions of how privilege creep can violate security principles.

CWNP Certified Wireless IoT Solutions Administrator Exam CWISA-102 CWISA Exam Questions