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CWNP Exam CWISA-102 Topic 2 Question 9 Discussion

Actual exam question for CWNP's CWISA-102 exam
Question #: 9
Topic #: 2
[All CWISA-102 Questions]

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?

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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
10 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
9 months ago
Agreed, always start at the bottom with Layer 1.
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Lucina
9 months ago
Layer 1, definitely. Check the physical connection first.
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Lilli
9 months ago
Agreed, always start troubleshooting from the bottom up.
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Brynn
9 months ago
Makes sense, gotta rule out the simple stuff first.
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Winifred
10 months ago
Agreed, start at the bottom and work your way up.
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Lavonda
10 months ago
Layer 1, definitely. Check the physical connections first.
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Delmy
10 months ago
Layer 1, definitely. Check the physical connection first.
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Maira
11 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
10 months ago
Layer 1 is always a good place to start troubleshooting.
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Gilberto
10 months ago
Let's start at Layer 1 and check the physical connections.
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Kris
11 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
11 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
11 months ago
Layer 1 is the way to go! Gotta start from the bottom to fix that wireless issue.
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Alecia
9 months ago
Layer 5 is too high up the OSI model for troubleshooting wireless connectivity.
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Domingo
9 months ago
C) Layer 5
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Michell
9 months ago
Exactly, Layer 1 deals with physical connections and is where the bottom-up method should begin.
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Coletta
9 months ago
A) Layer 1
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Kayleigh
10 months ago
Layer 4 is too high up the OSI model for troubleshooting wireless connectivity.
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Isabelle
10 months ago
B) Layer 4
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Colette
10 months ago
Agreed, starting at the physical layer makes sense.
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Odette
10 months ago
Yes, starting at Layer 1 is essential for troubleshooting wireless problems.
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Colette
10 months ago
Layer 1
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Chauncey
11 months ago
A) Layer 1
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