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CWNP CWISA-102 Exam - Topic 3 Question 48 Discussion

How does OFDMA differ from OFDM?
C) OFDMA allows multiple devices to transmit simultaneously on the same frequency
A) Subcarriers of OFDMA can contain data destined for a different receiver
B) OFDMA offers greater range by using multiple channels at once
D) OFDMA uses multiple radios to achieve higher throughput

CWNP CWISA-102 Exam - Topic 3 Question 48 Discussion

Actual exam question for CWNP's CWISA-102 exam
Question #: 48
Topic #: 3
[All CWISA-102 Questions]

How does OFDMA differ from OFDM?

Show Suggested Answer Hide Answer
Suggested 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


by Wayne at Jun 18, 2026, 03:09 AM

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Ronny
2 days ago
Wait, does OFDMA really use multiple radios? Sounds a bit much.
upvoted 0 times
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Kasandra
7 days ago
Totally agree, that's a game changer for efficiency!
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Edda
12 days ago
OFDMA lets different receivers share subcarriers, right?
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Tenesha
17 days ago
I’m leaning towards option C since it seems to fit with what I studied about simultaneous transmissions, but I need to double-check my notes.
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Carma
23 days ago
I feel like OFDMA is more about efficiency with subcarriers, but I can't recall if it really uses multiple radios like option D suggests.
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Dong
28 days ago
I remember practicing a question about how OFDMA can send data to different receivers, so I think option A might be correct.
upvoted 0 times
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Paz
1 month ago
I think OFDMA allows multiple devices to transmit at the same time, but I'm not completely sure if that's the main difference from OFDM.
upvoted 0 times
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