CWNP Exam CWNA-109 Topic 6 Question 7 Discussion

Actual exam question for CWNP's CWNA-109 exam

Question #: 7
Topic #: 6

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

AVHT (802.11ac).

BHT(802.11n)

CHR/DSSS (802.11b)

DHE (802.11ax)

Show Suggested 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.

by Stephen at Jun 28, 2024, 08:44 PM

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Valentine

3 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

4 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

3 months ago

Absolutely, with HE (802.11ax) you'll be ready for whatever comes next in wireless technology.

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Cruz

3 months ago

I agree, HE (802.11ax) is designed to handle the new frontier of Wi-Fi.

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Justa

3 months ago

Yeah, it's definitely the most advanced option for future-proofing your Wi-Fi.

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Arlene

3 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

4 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

2 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

2 months ago

No, I believe it's HE (802.11ax) that includes support for 6 GHz.

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Sabina

2 months ago

I think it's VHT (802.11ac) because it supports the 6 GHz band.

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Bonita

2 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

3 months ago

No, I believe it's HE (802.11ax) that supports the 6 GHz band.

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Jessenia

3 months ago

I think it's VHT (802.11ac) because it supports 6 GHz.

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Mollie

4 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

4 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

3 months ago

D) HE (802.11ax)

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Verlene

4 months ago

A) VHT (802.11ac).

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Hubert

4 months ago

I'm not sure, but I think A) VHT (802.11ac) also supports multiple bands.

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Kanisha

4 months ago

Gotta go with HE (802.11ax) here, the latest and greatest!

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Lino

3 months ago

HR/DSSS (802.11b) may be older, but it's still reliable for certain applications.

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Joana

3 months ago

HT (802.11n) has been around for a while but still holds up in terms of performance.

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Gerry

4 months ago

I think VHT (802.11ac) is also a strong contender with its support for multiple bands.

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Malinda

4 months ago

I agree, HE (802.11ax) is definitely the way to go for the latest technology.

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Lorean

4 months ago

I agree with Catalina, HE (802.11ax) supports operation in multiple bands.

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Brittni

4 months ago

VHT (802.11ac) supports 2.4 GHz, 5 GHz, and 6 GHz, so that's my pick.

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Laura

4 months ago

I think VHT (802.11ac) is the one that covers all those bands.

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Glendora

4 months ago

I agree, VHT (802.11ac) is the correct answer for that.

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Catalina

5 months ago

I think the answer is D) HE (802.11ax).

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