QUESTION: 9

What function does the IEEE perform in relation to wireless technologies?

Promotes technology and standards development
Designs wireless chipsets
Certified equipment to be compatible
Brings wireless products to market

Answer(s): A

Explanation:

IEEE's Role: The Institute of Electrical and Electronics Engineers (IEEE) is a global organization critical in developing and promoting technical standards across various fields, including wireless technologies.
Standards Work: IEEE creates wireless technology standards like:
IEEE 802.11: Wi-Fi standards
IEEE 802.15.4: Basis for ZigBee, Thread, and other low-power networks Reference:
IEEE: https://www.ieee.org/

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QUESTION: 10

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

SINR includes interference as well as the noise floor
SNR excludes the noise floor, which skews the results
SINR excludes interference and only measures the noise floor
SNR includes interference measurements that skew the results

Answer(s): A

Explanation:

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 noise and interference 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.

Reference:

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

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QUESTION: 11

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

Diffraction
Reflection
Attenuation
Scattering

Answer(s): C

Explanation:

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.

Reference:

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

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QUESTION: 12

How is ASK modulation different from FSK modulation?

ASK varies the amplitude of the signal while FSK shifts its frequency
FSK is more sensitive to noise than ASK
ASK does not work at high frequencies
ASK can carry more data than FSK

Answer(s): A

Explanation:

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.

Reference:

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

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Free CWISA-102 Exam Braindumps (page: 3)

QUESTION: 9

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QUESTION: 10

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QUESTION: 11

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QUESTION: 12

Explanation:

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