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Juniper Exam JN0-351 Topic 9 Question 19 Discussion

Actual exam question for Juniper's JN0-351 exam
Question #: 19
Topic #: 9
[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 Mozell at May 20, 2024, 08:13 PM

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Augustine
6 months ago
Hmm, I'd say A and C. Blocking the bad guys and learning the good guys' addresses. Gotta keep that bridge secure, you know?
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Leandro
5 months ago
No, flooding and listening are not part of building and maintaining a Layer 2 bridge table.
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Lavelle
5 months ago
D) listening
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Tonette
5 months ago
B) flooding
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Effie
5 months ago
Definitely not flooding and listening. Blocking and learning are the way to go.
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Angelo
5 months ago
D) listening
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Corrina
5 months ago
Exactly! Blocking to prevent unauthorized access and learning to store valid addresses in the bridge table.
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Elly
5 months ago
B) flooding
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Layla
5 months ago
That's right! Blocking and learning are essential for maintaining a secure bridge table.
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Yan
5 months ago
C) learning
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Margery
5 months ago
C) learning
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Xochitl
5 months ago
A) blocking
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Tuyet
5 months ago
A) blocking
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Hector
6 months ago
B and C, easy peasy. Learning the MAC addresses and flooding when necessary - that's the bread and butter of Layer 2 switching.
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Marjory
6 months ago
C and D, of course! Bridging is all about learning and listening, not blocking or flooding. That's more like my old roommate's party habits.
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Hester
5 months ago
Yeah, blocking and flooding are not part of the process. It's all about learning and listening.
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Jade
6 months ago
It's important to understand the difference between the different mechanisms in networking.
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Stephane
6 months ago
I agree, C and D are the correct mechanisms for building and maintaining a Layer 2 bridge table.
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Marget
6 months ago
B) flooding
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Herminia
6 months ago
Blocking and flooding are definitely not part of the mechanisms for a bridge table.
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Sharen
6 months ago
A) blocking
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Stefany
6 months ago
I agree, learning and listening are essential for building and maintaining a Layer 2 bridge table.
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