CWNP CWNA-109 Exam - Topic 3 Question 4 Discussion

Actual exam question for CWNP's CWNA-109 exam

Question #: 4
Topic #: 3

802. 11ax (HE) introduces Resource Units that can be used to allow communications with multiple devices at the same time, on the same channel, in the same BSS. What feature of 802.1 lax provides this functionality?

A6 GHz support

BTWT

CWi-Fi-LTE

DOFDMA

Show Suggested Answer

Suggested Answer: D

The feature of 802.11ax (HE) that provides this functionality isOFDM

A . OFDMA stands for Orthogonal Frequency Division Multiple Access and is a technology that allows multiple devices to communicate simultaneously on the same channel in the same BSS. OFDMA works by dividing a channel into smaller subchannels called Resource Units (RUs), which are composed of groups of subcarriers or tones. Each RU can be assigned to a different device based on its bandwidth requirement and signal quality. This way, OFDMA can increase the efficiency and capacity of the channel by reducing overhead, contention, and latency. OFDMA can also support both uplink and downlink multi-user transmissions using trigger frames and buffer status reports. 6 GHz support, TWT, and Wi-Fi-LTE are not features of 802.11ax that provide this functionality.Reference:[CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 226; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 216.

by Chun at Jun 18, 2024, 08:37 AM

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Patrick

9 months ago

Not sure if OFDMA is enough for all devices, though.

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Beth

9 months ago

6 GHz support is cool, but OFDMA is what we need for simultaneous connections.

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Reid

10 months ago

Wait, I thought TWT was the main feature for that?

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Carin

10 months ago

Totally agree, OFDMA makes multi-device comms possible.

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Linn

10 months ago

OFDMA is the key feature here!

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Sheridan

10 months ago

I thought 6 GHz support was important for bandwidth, but I’m not confident it relates directly to the Resource Units functionality.

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Carin

11 months ago

I feel like I’ve seen a practice question where OFDMA was highlighted as the main feature for efficient channel usage.

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Paola

11 months ago

I’m not entirely sure, but I think TWT was more about power saving rather than enabling multiple communications.

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Dahlia

11 months ago

I remember studying OFDMA as a key feature in 802.11ax that allows multiple devices to communicate simultaneously.

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Rory

11 months ago

I'm a little unsure on this one. Is it the 6 GHz support that enables the multi-device communication? Or is it the TWT (Target Wake Time) feature? I'll have to review my notes to see which 802.11ax capability is specifically mentioned here.

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Annice

11 months ago

Okay, I think I've got this. The question is asking about the 802.11ax feature that enables communication with multiple devices at the same time on the same channel. That has to be OFDMA, right? I'm feeling pretty confident about that.

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Lashon

11 months ago

Hmm, I'm a bit confused on this one. I know 802.11ax introduced some new capabilities, but I'm not totally sure which one specifically allows for the multi-device communication on the same channel. I'll have to think this through carefully.

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Adell

11 months ago

I'm pretty sure this has to do with OFDMA, which allows for multiple devices to communicate on the same channel at the same time. That sounds like the key feature they're asking about.

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Josephine

11 months ago

Hmm, I'm a bit confused by the different options. A MAC filter, IP filter, or 'discard-unknown' feature - which one would be the best choice here? I'll need to re-read the question carefully to decide.

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Garry

11 months ago

I'm not totally sure, but I think AWS Lambda is more for automation tasks, so wouldn't it be better to let ACM handle renewals directly instead of writing a function?

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Dorian

11 months ago

Hmm, I'm a bit confused on this one. I'll have to think it through carefully.

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Alaine

11 months ago

Alright, let's break this down. MS operating profit is 41,000, and we need to subtract the finance cost of 3,000 and the tax of 11,000 to get the profit before the joint venture adjustment. Then we add the dividend from JV2 to get the share of joint venture MS Group received.

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