CWNP CWNA-109 Exam - Topic 2 Question 21 Discussion

Actual exam question for CWNP's CWNA-109 exam

Question #: 21
Topic #: 2

What statement about 802.11 WLAN bridges is true?

AWLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications

BWLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally

CWLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band

DWLAN bridges must be implemented such that no interference occurs on the channel anywhere between the two endpoints used to establish the bridge

Show Suggested Answer

Suggested Answer: C

What should be inspected to verify proper configuration isDNS. DNS stands for Domain Name System and is a service that resolves hostnames to IP addresses. In a controller-based AP deployment, DNS can be used to help the AP locate the controller by using a predefined hostname such as CISCO-CAPWAP-CONTROLLER or aruba-master. The AP sends a DNS query for this hostname and receives an IP address of the controller as a response. Therefore, if DNS is not configured properly or if there is no DNS entry for the controller hostname, the AP may not be able to locate the controller. NTP, BOOTP, and AP hosts file are not relevant for this scenario.Reference:[CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 374; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 364.

by Laura at Jan 12, 2025, 09:11 PM

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Graham

6 months ago

C is a stretch, I've seen MIMO in 2.4 GHz too.

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Georgene

6 months ago

D makes sense, interference can really mess things up.

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Raylene

6 months ago

Surprised to see C, I thought MIMO was more flexible than that!

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Trinidad

7 months ago

I think A is misleading, WLAN bridges can work in both bands.

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Julene

7 months ago

B is definitely true, SNR is key for data rates!

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Solange

7 months ago

I recall that interference is a big deal, but I'm not confident if D is the only requirement for WLAN bridges.

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Gearldine

7 months ago

I practiced a question similar to this, and I think MIMO can be used in both bands, so C seems off to me.

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Latosha

7 months ago

I'm not entirely sure, but I feel like bridges can work in both frequency bands, not just 2.4 GHz.

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Donte

8 months ago

I remember something about SNR being important for maintaining data rates, so I think B might be the right answer.

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Candida

8 months ago

The key here is to focus on the specific capabilities of WLAN bridges, like the frequency bands they operate in and their support for MIMO. I think I can eliminate a few of these options pretty quickly.

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Walton

8 months ago

I'm a bit confused about the SISO and MIMO requirements for WLAN bridges. I'll have to review my notes to make sure I understand the differences.

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Sabina

8 months ago

Okay, let me break this down step-by-step. I know WLAN bridges need to maintain good SNR between the endpoints, and they can support MIMO in the 5 GHz band. I just need to double-check the other details.

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Lezlie

8 months ago

Hmm, I'm not sure about the details of WLAN bridges and their frequency band and MIMO capabilities. I'll need to think this through carefully.

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Chauncey

8 months ago

This question seems straightforward, I'm pretty confident I can answer it correctly.

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Anjelica

1 year ago

I heard WLAN bridges are so smart, they can even communicate with aliens on the 6 GHz band. Mind-blowing technology!

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Dierdre

1 year ago

Option A is definitely wrong. WLAN bridges can work in multiple frequency bands, not just 2.4 GHz.

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Beckie

11 months ago

C) WLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band

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Casie

11 months ago

B) WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally

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Man

11 months ago

A) WLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications

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Lavonna

1 year ago

Haha, option D is just ridiculous. Expecting no interference between the endpoints? Good luck with that!

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Annette

1 year ago

User 2: Yeah, it's almost impossible to have no interference between the endpoints.

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Albina

1 year ago

User 1: I know right, option D is unrealistic.

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Dan

1 year ago

I'm not sure, but I think it makes sense. Interference can really affect the performance of WLAN bridges.

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Joseph

1 year ago

I agree with Claribel, because maintaining a good SNR is crucial for data rate.

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Berry

1 year ago

I'm not sure about the MIMO support, but I think C is the correct answer. WLAN bridges can use MIMO, but only in the 5 GHz band.

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Donette

1 year ago

User 4: Yes, maintaining a good SNR is crucial for maintaining the desired data rate.

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Lauryn

1 year ago

User 3: So, WLAN bridges must be implemented carefully to avoid interference on the channel?

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Jina

1 year ago

User 2: I agree, MIMO support is important for higher data rates.

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Kristeen

1 year ago

User 1: I think C is the correct answer. WLAN bridges can use MIMO, but only in the 5 GHz band.

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Hollis

1 year ago

Option B seems the most accurate. WLAN bridges need a good SNR link in both directions to maintain the required data rate.

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Claribel

1 year ago

I think the answer is B.

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