CWNP Exam CWISA-102 Topic 2 Question 9 Discussion

Actual exam question for CWNP's CWISA-102 exam

Question #: 9
Topic #: 2

You are troubleshooting a problem with a wireless solution that uses MQTT where the IoT end devices are not reporting to the MQTT server/broker. At what Layer of the OSI Model should troubleshooting begin when using a bottom-up method?

ALayer 1

BLayer 4

CLayer 5

DLayer 6

Show Suggested Answer

Suggested Answer: A

Bottom-Up Troubleshooting:The OSI model provides a structured diagnostic approach. Starting at Layer 1 ensures basic physical connectivity issues are ruled out first.

MQTT Relies on IP:MQTT operates at a higher layer of the OSI model, relying on TCP/IP (Layers 4 and 3) for communication. Problems at the physical layer will disrupt everything built upon it.

Checking the Fundamentals:Before investigating complex application issues (MQTT), verify cables, link lights, Wi-Fi signal strength, etc.

References:

OSI Model:Descriptions of the seven layers, emphasizing the foundation provided by Layer 1 (Physical).

Network Troubleshooting Guides:Resources that outline common Layer 1 problems and their symptoms.

by Mireya at May 22, 2024, 04:58 PM

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Teddy

7 months ago

Layer 1, of course! Troubleshooting 101 - always start with the basics, like making sure the device is plugged in. *wink wink*

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Carli

6 months ago

Agreed, always start at the bottom with Layer 1.

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Lucina

6 months ago

Layer 1, definitely. Check the physical connection first.

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Lilli

6 months ago

Agreed, always start troubleshooting from the bottom up.

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Brynn

6 months ago

Makes sense, gotta rule out the simple stuff first.

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Winifred

6 months ago

Agreed, start at the bottom and work your way up.

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Lavonda

6 months ago

Layer 1, definitely. Check the physical connections first.

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Delmy

6 months ago

Layer 1, definitely. Check the physical connection first.

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Maira

7 months ago

Layer 6? What is this, a trick question? Let's keep it simple and start with Layer 1.

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Stephane

6 months ago

Layer 1 is always a good place to start troubleshooting.

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Gilberto

6 months ago

Let's start at Layer 1 and check the physical connections.

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Kris

7 months ago

Layer 5? Really? I'd be more worried about the physical connection before worrying about the session layer.

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Carla

7 months ago

Hmm, I'm thinking Layer 4 would be the best place to start. After all, that's where the MQTT protocol lives, right?

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Avery

7 months ago

Layer 1 is the way to go! Gotta start from the bottom to fix that wireless issue.

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Alecia

6 months ago

Layer 5 is too high up the OSI model for troubleshooting wireless connectivity.

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Domingo

6 months ago

C) Layer 5

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Michell

6 months ago

Exactly, Layer 1 deals with physical connections and is where the bottom-up method should begin.

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Coletta

6 months ago

A) Layer 1

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Kayleigh

6 months ago

Layer 4 is too high up the OSI model for troubleshooting wireless connectivity.

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Isabelle

6 months ago

B) Layer 4

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Colette

7 months ago

Agreed, starting at the physical layer makes sense.

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Odette

7 months ago

Yes, starting at Layer 1 is essential for troubleshooting wireless problems.

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Colette

7 months ago

Layer 1

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Chauncey

7 months ago

A) Layer 1

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