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CWNP CWISA-102 Exam - Topic 3 Question 35 Discussion

What metric is used to express a relative increase or decrease in signal strength?
C) dB
A) W
B) dBm
D) mW

CWNP CWISA-102 Exam - Topic 3 Question 35 Discussion

Actual exam question for CWNP's CWISA-102 exam
Question #: 35
Topic #: 3
[All CWISA-102 Questions]

What metric is used to express a relative increase or decrease in signal strength?

Show Suggested Answer Hide Answer
Suggested Answer: C

Decibel (dB):A logarithmic unit expressing ratios of power or signal strength. It's used in RF contexts due to the wide range of signal levels encountered.

Examples:

dBm:Decibels relative to one milliwatt (power measurement).

dBi:Decibels relative to an isotropic antenna (antenna gain).

References

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


by Elfriede at Jul 14, 2025, 10:42 PM

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Daniel
8 months ago
Wait, isn't dBm also used for absolute power?
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Audra
8 months ago
I thought it was dBm, but I guess not.
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Lashon
9 months ago
dB is the right answer, no doubt!
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Agustin
9 months ago
Really? I always thought it was mW for signal strength.
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Lonna
9 months ago
It's definitely dB for relative changes!
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Gayla
9 months ago
I’m a bit confused. I thought dBm was used for power levels, but dB seems more fitting for relative changes.
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Matthew
10 months ago
I’m leaning towards dB as well. It’s used to express gain or loss, right?
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Carin
10 months ago
I practiced a question like this before, and I believe dBm is for absolute power, not relative changes.
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Marsha
10 months ago
I think the answer might be dB, but I'm not completely sure. I remember it being related to logarithmic scales.
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Jaime
10 months ago
Wait, is it dB or dBm? I'm getting a bit confused between the two. I should review my notes on signal measurements before answering this.
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Tenesha
10 months ago
Okay, I think I've got this. dB is the metric used to express relative increases or decreases in signal strength, right? It's a logarithmic scale that allows you to easily compare different signal levels.
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Lindy
11 months ago
Hmm, I'm a bit unsure about this one. I know dBm is used for absolute power measurements, but I can't remember if that's the same for relative changes. I'll have to think this through carefully.
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Rosita
11 months ago
I'm pretty sure the answer is dB, since that's the standard unit for expressing relative changes in signal strength.
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Joni
1 year ago
I believe it's B) dBm because it's commonly used in signal strength measurements.
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Garry
1 year ago
I'm not sure, but I think it's C) dB.
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Adell
1 year ago
This is easy, C) dB is the answer. Unless you're measuring the power of a lightsaber, in which case, may the Watts be with you.
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Arlen
1 year ago
I agree with Alayna, dBm is used to express signal strength.
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Octavio
1 year ago
D) mW, of course! Watts are the true measure of power, not this dB mumbo-jumbo. Keep it simple, folks.
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Oren
11 months ago
C) dB is also commonly used in signal strength measurements.
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Tequila
11 months ago
B) dBm is actually the metric used to express a relative increase or decrease in signal strength.
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Alayna
1 year ago
I think the answer is B) dBm.
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Elliott
1 year ago
Hmm, I'm torn between B) dBm and C) dB. They both seem like valid options, but I'll go with dBm just to be safe.
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Alecia
11 months ago
I agree, dBm is the unit used to express signal strength.
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Kirk
1 year ago
I think the correct answer is B) dBm.
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Bulah
1 year ago
B) dBm is the way to go. Who cares about watts when you can use decibels? Much more techie sounding.
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Fabiola
1 year ago
B) dBm is the way to go. Who cares about watts when you can use decibels? Much more techie sounding.
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Jettie
1 year ago
A) W
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Lacey
1 year ago
Definitely C) dB - it's the go-to metric for measuring signal strength changes.
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Vincent
1 year ago
I agree with you, dB is definitely the metric used to show relative increase or decrease in signal strength.
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Cassie
1 year ago
Actually, I believe it's C) dB, that's the standard unit for expressing signal strength changes.
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Percy
1 year ago
I think the answer is B) dBm, it's commonly used in signal strength measurements.
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