CWNP CWISA-102 CWISA Exam Practice Test Instant Access

Question 1

What is the benefit of using SINR as opposed to SNR to reference signal quality at a receiver?

ASINR includes interference as well as the noise floor

BSNR excludes the noise floor, which skews the results

CSINR excludes interference and only measures the noise floor

DSNR includes interference measurements that skew the results

Answer : A

SINR vs. SNR:

SNR (Signal-to-Noise Ratio):Measures the power of the desired signal relative to background noise.

SINR (Signal-to-Interference-plus-Noise Ratio):Considers both background noiseandinterference from other signals operating on the same frequency.

Practical Importance:SINR is a more realistic indicator of real-world signal quality in wireless environments where interference is a significant factor.

References

SINR:https://en.wikipedia.org/wiki/Signal-to-interference-plus-noise_ratio

SNR:https://en.wikipedia.org/wiki/Signal-to-noise_ratio

Question 2

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 3

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.

Question 4

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 5

What organization maintains and publishes the 802.15.4 Standard?

ABluetooth SIG

BIEEE

CIETF

DZigbee Alliance

Answer : B

IEEE 802.15.4:The IEEE 802.15.4 standard is a fundamental specification for low-rate wireless personal area networks (LR-WPANs). It serves as the basis for many wireless IoT protocols.

IEEE's Role:The Institute of Electrical and Electronics Engineers (IEEE) is the organization responsible for creating, maintaining, and publishing the 802.15.4 standard.

References

IEEE 802.15.4 Standard:https://standards.ieee.org/standard/802_15_4-2020.html

IEEE Website:https://www.ieee.org/

Question 6

What is defined as the weakening of signal amplitude as the signal passes through a medium?

ADiffraction

BReflection

CAttenuation

DScattering

Answer : C

Attenuation:Describes the progressive loss of signal strength as it travels through a medium (like air, cables, walls). It's caused by factors like absorption, distance, and obstacles.

Other Phenomena:

Diffraction:Bending of waves around obstacles.

Reflection:Waves bouncing off surfaces.

**Scattering: ** Waves dispersing in multiple directions.

References

Attenuation:https://en.wikipedia.org/wiki/Attenuation

Question 7

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

APoE midspan injector

BPoE endspan switch

CPoE coupler

DPoE splitter

Answer : D

PoE Splitter:A PoE splitter separates power and data from a PoE-enabled Ethernet cable, allowing the powering of non-PoE devices.

Other PoE Devices:

PoE Injector:Adds power to non-PoE Ethernet cable.

PoE Switch:Provides power directly through its ports.

CWNP CWISA-102 Certified Wireless IoT Solutions Administrator Exam CWISA Exam Practice Test