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CWNP Exam CWNA-109 Topic 6 Question 7 Discussion

Actual exam question for CWNP's CWNA-109 exam
Question #: 7
Topic #: 6
[All CWNA-109 Questions]

Which IEEE 802.11 physical layer (PHY) specification includes support for operation in the 2.4 GHz, 5 GHz, and 6 GHz bands?

Show Suggested Answer Hide Answer
Suggested Answer: D

The IEEE 802.11ax standard, also known as High-Efficiency Wireless (HEW) or simply HE, includes support for operation across multiple frequency bands: 2.4 GHz, 5 GHz, and, with the appropriate regulatory approvals, the 6 GHz band. This makes option D the correct answer. Here's how it compares to the other options:

HE (802.11ax): Introduced as an enhancement over previous standards, 802.11ax is designed to improve efficiency, especially in dense environments. It supports operation in the 2.4 GHz, 5 GHz, and 6 GHz bands (the latter pending regulatory approval in various regions), making it highly versatile and future-proof.

VHT (802.11ac): Very High Throughput, or 802.11ac, operates exclusively in the 5 GHz band. It introduced significant speed improvements over its predecessor (802.11n) but does not support the 2.4 GHz or 6 GHz bands.

HT (802.11n): High Throughput, or 802.11n, supports operation in both the 2.4 GHz and 5 GHz bands. However, it does not include support for the 6 GHz band.

HR/DSSS (802.11b): High-Rate Direct Sequence Spread Spectrum, or 802.11b, operates only in the 2.4 GHz band. It was one of the early Wi-Fi standards and does not support 5 GHz or 6 GHz bands.

Given these distinctions, only 802.11ax (option D) supports operation across all three mentioned bands, aligning with the requirements stated in the question.


IEEE 802.11ax-2021: High-Efficiency Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications.

Understanding the 802.11ax (Wi-Fi 6) standard and its implications for modern wireless networking.

Contribute your Thoughts:

Valentine
4 months ago
Ah, the eternal battle of Wi-Fi specs. I'm just gonna throw a dart and hope for the best.
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Carole
5 months ago
6 GHz, huh? That's like, the new frontier of Wi-Fi. I bet the right answer is HE (802.11ax) - future-proof all the way!
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Val
4 months ago
Absolutely, with HE (802.11ax) you'll be ready for whatever comes next in wireless technology.
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Cruz
4 months ago
I agree, HE (802.11ax) is designed to handle the new frontier of Wi-Fi.
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Justa
4 months ago
Yeah, it's definitely the most advanced option for future-proofing your Wi-Fi.
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Arlene
4 months ago
I think you're right, HE (802.11ax) is the way to go for the 6 GHz band.
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Josphine
5 months ago
Looks like a trick question. They're all IEEE 802.11 PHY specs, but only one supports 6 GHz. Gotta be VHT (802.11ac).
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Selene
3 months ago
Actually, you're right. VHT (802.11ac) is the one that covers 2.4 GHz, 5 GHz, and 6 GHz bands.
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Art
3 months ago
No, I believe it's HE (802.11ax) that includes support for 6 GHz.
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Sabina
3 months ago
I think it's VHT (802.11ac) because it supports the 6 GHz band.
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Bonita
3 months ago
Actually, you're right. VHT (802.11ac) is the one that supports operation in the 2.4 GHz, 5 GHz, and 6 GHz bands.
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Broderick
4 months ago
No, I believe it's HE (802.11ax) that supports the 6 GHz band.
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Jessenia
4 months ago
I think it's VHT (802.11ac) because it supports 6 GHz.
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Mollie
5 months ago
I think the answer is D) HE (802.11ax) because it is the latest standard with support for 6 GHz band.
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Alise
5 months ago
Hmm, I'm torn between HT (802.11n) and HE (802.11ax). Maybe I should just ask Alexa for the answer.
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Laurel
4 months ago
D) HE (802.11ax)
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Verlene
5 months ago
A) VHT (802.11ac).
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Hubert
5 months ago
I'm not sure, but I think A) VHT (802.11ac) also supports multiple bands.
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Kanisha
5 months ago
Gotta go with HE (802.11ax) here, the latest and greatest!
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Lino
4 months ago
HR/DSSS (802.11b) may be older, but it's still reliable for certain applications.
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Joana
4 months ago
HT (802.11n) has been around for a while but still holds up in terms of performance.
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Gerry
5 months ago
I think VHT (802.11ac) is also a strong contender with its support for multiple bands.
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Malinda
5 months ago
I agree, HE (802.11ax) is definitely the way to go for the latest technology.
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Lorean
5 months ago
I agree with Catalina, HE (802.11ax) supports operation in multiple bands.
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Brittni
5 months ago
VHT (802.11ac) supports 2.4 GHz, 5 GHz, and 6 GHz, so that's my pick.
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Laura
5 months ago
I think VHT (802.11ac) is the one that covers all those bands.
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Glendora
5 months ago
I agree, VHT (802.11ac) is the correct answer for that.
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Catalina
6 months ago
I think the answer is D) HE (802.11ax).
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