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CWNP CWISA-103 Exam - Topic 3 Question 14 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-103 Exam - Topic 3 Question 14 Discussion

Actual exam question for CWNP's CWISA-103 exam
Question #: 14
Topic #: 3
[All CWISA-103 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.

Reference

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

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


by Sherell at May 28, 2026, 12:42 PM

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Lino
3 days ago
I feel like OFDMA is more advanced than OFDM.
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Luke
8 days ago
Yeah, I agree! That's option C. It’s efficient for many users.
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Bambi
14 days ago
I think OFDMA allows multiple devices to transmit simultaneously.
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Lindy
19 days ago
Yes, OFDMA allows simultaneous transmissions, which is awesome!
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Ngoc
24 days ago
I thought OFDM was already efficient enough. Why the need for OFDMA?
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Ressie
29 days ago
Wait, does OFDMA really use multiple radios? Sounds complicated.
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Katheryn
1 month ago
Totally agree, that's a game changer!
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Vivan
1 month ago
OFDMA lets different receivers share subcarriers, right?
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Cammy
1 month ago
I’m a bit confused about the range aspect. I thought OFDMA just improved capacity, not necessarily range. Did we cover that?
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Destiny
2 months ago
I feel like I saw something about OFDMA using subcarriers for different receivers in a practice test, but I can't recall the details.
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Diego
2 months ago
I remember practicing a question about how OFDMA improves efficiency by letting different users transmit at the same time. So, I think option C sounds right.
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Erinn
2 months ago
I think OFDMA is about allowing multiple users to share the same channel, but I'm not entirely sure how that differs from OFDM.
upvoted 0 times
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