CWNP CWNA-109 Exam - 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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Rosendo

9 months ago

802.11n only covers 2.4 and 5 GHz, just FYI!

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Marleen

9 months ago

Wait, does 802.11ax really work in all those bands? Sounds too good to be true.

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Glendora

10 months ago

I thought 802.11ac was the latest. Surprised to learn about 802.11ax!

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Cheryl

10 months ago

Agreed! 802.11ax is the way to go for modern networks.

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Desmond

10 months ago

It's definitely HE (802.11ax) that supports all three bands.

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Willard

10 months ago

I’m torn between B and D, but I think D is more recent and includes all three bands.

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Lina

11 months ago

I recall that 802.11n supports both 2.4 GHz and 5 GHz, but I don't think it covers 6 GHz.

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Rolf

11 months ago

I feel like I studied something about 802.11ac being limited to 5 GHz, so it can't be A.

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Kristine

11 months ago

I think the answer might be D, HE (802.11ax), but I'm not completely sure. I remember it covers multiple bands.

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Kizzy

11 months ago

I'm pretty sure the answer is D. HE (802.11ax) is the latest standard and it supports operation in all three frequency bands - 2.4 GHz, 5 GHz, and 6 GHz.

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Linwood

11 months ago

Okay, let me think this through step-by-step. 802.11b is 2.4 GHz only, 802.11n is 2.4 GHz and 5 GHz, and 802.11ac is 2.4 GHz, 5 GHz, and 6 GHz. So the answer has to be VHT (802.11ac).

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Oliva

11 months ago

Hmm, I'm a little unsure on this one. I know 802.11n supports 2.4 GHz and 5 GHz, but I can't remember if it includes 6 GHz. I'll have to think this through carefully.

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Kyoko

11 months ago

This one seems pretty straightforward. I'm pretty confident the answer is VHT (802.11ac) since that specification supports the 2.4 GHz, 5 GHz, and 6 GHz bands.

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Janna

11 months ago

Hmm, I'm a bit unsure about this one. I'll need to double-check the PEP 8 recommendations on docstrings and comments to make sure I pick the right answers.

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Stephane

11 months ago

This question seems pretty straightforward. The four levels of security are User Authentication, Document, Task, and Cell Level. I'm confident those are the correct choices.

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Carey

11 months ago

Hmm, I'm a bit unsure about this one. I think I need to use a stream or a lambda expression to filter the longlist, but I'm not 100% sure of the syntax.

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Felix

11 months ago

This looks like a straightforward OSPF configuration question. I'll need to carefully analyze the network topology and requirements to determine the correct option.

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Colby

11 months ago

I practiced a similar question where return traffic rules were definitely a key point. B might be correct, but I'm second guessing it now!

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Destiny

11 months ago

Okay, let's see. The question is asking about a document that informs others of received goods. I'm going to go with D - Packing slip.

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Valentine

2 years 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

2 years 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

2 years ago

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

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Cruz

2 years ago

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

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Justa

2 years ago

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

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Arlene

2 years ago

I think you're right, HE (802.11ax) is the way to go for the 6 GHz band.

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Josphine

2 years 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 years 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 years ago

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

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Sabina

2 years ago

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

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Bonita

2 years 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

2 years ago

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

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Jessenia

2 years ago

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

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Mollie

2 years 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

2 years 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

2 years ago

D) HE (802.11ax)

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Verlene

2 years ago

A) VHT (802.11ac).

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Hubert

2 years ago

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

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Kanisha

2 years ago

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

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Lino

2 years ago

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

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Joana

2 years ago

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

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Gerry

2 years ago

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

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Malinda

2 years ago

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

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Lorean

2 years ago

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

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Brittni

2 years ago

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

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Laura

2 years ago

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

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Glendora

2 years ago

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

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Catalina

2 years ago

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

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