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Juniper JN0-351 Exam - Topic 5 Question 11 Discussion

Actual exam question for Juniper's JN0-351 exam
Question #: 11
Topic #: 5
[All JN0-351 Questions]

Which two mechanisms are part of building and maintaining a Layer 2 bridge table? (Choose two.)

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Suggested Answer: B, C

Option B is correct.Flooding is a mechanism used in Layer 2 bridging where the switch sends incoming packets to all its ports except for the port where the packet originated1.This is done when the switch doesn't know the destination MAC address or when the packet is a broadcast or multicast1.

Option C is correct.Learning is another mechanism used in Layer 2 bridging where the switch learns the source MAC addresses of incoming packets and associates them with the port on which they were received23.This information is stored in a MAC address table, also known as a bridge table23.

Option A is incorrect.Blocking is a state in Spanning Tree Protocol (STP) used to prevent loops in a network2.It's not a mechanism used in building and maintaining a Layer 2 bridge table2.

Option D is incorrect.Listening is also a state in Spanning Tree Protocol (STP) where the switch listens for BPDUs to make sure no loops occur in the network before transitioning to the learning state2.It's not a mechanism used in building and maintaining a Layer 2 bridge table2.


by Carissa at Jan 27, 2024, 07:09 PM

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Ty
3 months ago
Blocking seems off, but I could be wrong.
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Emily
3 months ago
Yeah, learning is a must for bridges!
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Ellsworth
4 months ago
Wait, is listening really a mechanism?
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Krystina
4 months ago
I thought blocking was part of it too?
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Whitney
4 months ago
Definitely learning and flooding!
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Golda
4 months ago
I feel like listening might be a part of it too, but I can't quite remember how it fits in with the others.
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Haley
4 months ago
Blocking sounds familiar, but I can't recall if it's actually part of the bridge table process.
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Wilford
4 months ago
I remember practicing a question like this, and I think flooding is involved when the MAC address isn't known.
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Benedict
5 months ago
I think one of the mechanisms is definitely learning, but I'm not sure about the second one.
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Roy
5 months ago
I'm a bit confused by this question. I know switches use a MAC address table, but I'm not sure about the specific mechanisms involved in building and maintaining it. I'll have to review my notes on switching before I can answer this confidently.
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Azalee
5 months ago
Okay, I've got this. The two mechanisms are learning and flooding. Switches learn MAC addresses by observing the source addresses of frames, and they flood frames to unknown destinations until they learn the correct MAC address to forward to.
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Reed
5 months ago
Hmm, this is a tricky one. I know learning is definitely involved, but I'm not sure about the other mechanism. Blocking and listening don't sound quite right to me. I'll have to think this through carefully.
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Amber
5 months ago
I'm pretty sure this is about how switches build and maintain their MAC address tables. I think the key mechanisms are learning and flooding, but I'm not 100% sure about the other options.
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Juliann
5 months ago
Ugh, I'm drawing a blank on the different organizational structures. I know there's a functional, project, and matrix structure, but I can't remember which one combines the functional and project approaches. I'll have to guess on this one.
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Grover
5 months ago
Okay, I've got this. The term that represents a complete supply chain for returns, repair, and recycling is "Reverse logistics." That's the most relevant and comprehensive option here.
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Dorothea
5 months ago
I think we discussed something similar in class. Appraising performance is definitely a task, but wasn't it described as more of a managerial role than a leadership one?
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Corinne
5 months ago
I'm feeling confident about this one. The rules of evidence are focused on things like authenticity, believability, and completeness of evidence. "Non-admissible" is the odd one out that doesn't fit with those concepts.
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