CWNP CWNA-109 Exam - Topic 3 Question 6 Discussion

Actual exam question for CWNP's CWNA-109 exam

Question #: 6
Topic #: 3

An AP is advertised as a tri-band, 4x4:4, Wi-Fi 6, 802. 11ax AP. Based on this information and assuming it is correctly advertised, what can be determined as certainly true about this AP?

AIt supports four channels in 2.4 GHz and 4 channels in 5 GHz

BIt supports UL-MU-MIMO

CIt uses a modified OpenWRT firmware

DIt has 4 radio chains

Show Suggested Answer

Suggested Answer: D

Based on the information given, what can be determined as certainly true about this AP is thatit has 4 radio chains. A radio chain is a hardware component that consists of an antenna, a radio frequency (RF) amplifier, and a transceiver. The number of radio chains indicates how many spatial streams an AP can transmit or receive simultaneously using Multiple Input Multiple Output (MIMO) technology. The notation x:y:z in an AP specification denotes the number of radio chains (x), the number of spatial streams (y), and the number of spatial streams per band (z). Therefore, a tri-band, 4x4:4, Wi-Fi 6, 802.11ax AP has four radio chains in each of its three bands (2.4 GHz, low 5 GHz, and high 5 GHz). It also supports four spatial streams in total and four spatial streams per band. It cannot be determined as certainly true that it supports four channels in each band, UL-MU-MIMO, or uses a modified OpenWRT firmware based on the information given.Reference:[CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 223; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 213.

by Staci at Jun 22, 2024, 04:03 PM

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Junita

3 months ago

No way it uses OpenWRT, that's just not standard for APs.

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Lashanda

3 months ago

Surprised they didn't mention the channels explicitly.

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Leonor

3 months ago

But does it really support UL-MU-MIMO?

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Claudia

4 months ago

Agree, that's a given with 4x4:4.

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Delila

4 months ago

It definitely has 4 radio chains.

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Hoa

4 months ago

I don't think option C about OpenWRT firmware can be determined just from the specs given; that seems more specific than what the question provides.

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Mariann

4 months ago

I practiced a question similar to this, and I think option D about having 4 radio chains is definitely true since it’s a 4x4:4 AP.

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Eleonore

4 months ago

I think option B about UL-MU-MIMO is likely true since Wi-Fi 6 typically supports that feature, but I can't recall if it's guaranteed just from the tri-band info.

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Dacia

5 months ago

I remember that tri-band means it can operate on three different frequency bands, but I'm not sure about the specifics of the channel support.

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Carmelina

5 months ago

This is a good question to test our knowledge of the latest Wi-Fi standards and AP specifications. I'll need to recall the details, but I'm confident I can work through this systematically.

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Mike

5 months ago

I think I know the answer, but I want to double-check my understanding. The 4x4:4 means it has 4 spatial streams, right? And tri-band means it supports 2.4GHz, 5GHz, and 6GHz bands. Does that sound correct?

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Theron

5 months ago

Okay, let's break this down step-by-step. The key information is that it's a Wi-Fi 6, 802.11ax AP with 4x4:4 configuration. That tells me a lot about the supported features and capabilities.

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Benedict

5 months ago

Hmm, I'm a bit confused by the terminology here. I'll need to think through the details of what "tri-band" and "4x4:4" mean for this AP.

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Edgar

5 months ago

This seems like a straightforward question about the capabilities of the advertised AP. I'm pretty confident I can figure this out.

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Kara

5 months ago

Easy peasy! Router B has the highest priority, so it will be elected the PIM DR. The other router details don't really matter in this case.

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Edgar

5 months ago

This question seems straightforward. I think the service architecture is most comparable to an application architecture.

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Lizbeth

5 months ago

Hmm, this seems like a tricky one. I'm not entirely sure what the Dynamic Failure Detection and Recovery pattern is, but I'll try to think through the options carefully.

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Joseph

5 months ago

Okay, I think I've got this. The key is to look for the command that will upgrade all the currently installed packages to their newest versions. Based on the options given, I'm pretty sure the answer is "dist-upgrade".

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