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Nokia 4A0-105 Exam - Topic 3 Question 77 Discussion

Actual exam question for Nokia's 4A0-105 exam

Question #: 77
Topic #: 3

[All 4A0-105 Questions]

How is MAC learning achieved in traditional Ethernet switches?

AAs frames leave the switch, the DA is populated into the FDB.

BAs frames enter the switch, the DA is populated into the FDB.

CAs frames leave the switch, the SA is populated into the FDB.

DAs frames enter the switch, the SA is populated into the FDB.

Show Suggested Answer

Suggested Answer: D

by Ronny at Nov 24, 2023, 09:01 AM

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Serita

8 months ago

Just to clarify, it's the source address that goes into the FDB, right?

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Katie

8 months ago

Wait, are you sure? I thought it was the SA that gets populated.

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Franchesca

8 months ago

Totally agree with B, that's how it works!

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Kallie

9 months ago

I thought it was C, but I guess I was wrong!

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Cherilyn

9 months ago

It's definitely B, the DA gets added when frames come in.

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Rashad

9 months ago

I’m confused about the direction; I thought it was when frames leave the switch. I might go with option A, but I’m not confident.

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Pa

9 months ago

I practiced a similar question, and I feel like it was about the DA being populated. Could it be A or C?

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Ruthann

9 months ago

I’m not entirely sure, but I remember something about the source address being added to the FDB. Maybe it’s option D?

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Silvana

9 months ago

I think MAC learning happens when frames enter the switch, so I’m leaning towards option B.

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Eileen

9 months ago

Hmm, I'm a bit unsure about this one. Is it the source or destination MAC that gets learned? I feel like I should know this, but I'm drawing a blank. Maybe I'll just make an educated guess and move on.

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Lorean

10 months ago

I've got this! Ethernet switches use MAC address learning to build their FDB. The source MAC address of incoming frames is what gets added to the FDB, not the destination. So the correct answer is option D.

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Ryann

10 months ago

Okay, let me think this through. I know the FDB is used for forwarding decisions, but I'm not sure if the destination or source MAC address is what gets added to it. I'll have to carefully consider the options.

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Arthur

10 months ago

Hmm, this seems like a straightforward question about how Ethernet switches learn MAC addresses. I think the key is to remember that the switch populates its forwarding database (FDB) based on the source MAC addresses it sees in incoming frames.

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Annelle

10 months ago

I'm confident the answer is A. Netezza is designed for high-performance analytics, and GPFS is a scalable file system well-suited for that use case.

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Darci

10 months ago

Okay, I think I've got a handle on this. The key is to match up the responsibilities with the appropriate roles based on their typical duties.

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Valentine

10 months ago

This one seems pretty straightforward. I'd go with /proc since that's a virtual filesystem that doesn't need to be backed up.

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Selene

10 months ago

Hmm, I'm a little unsure about this one. The options seem to cover different aspects of project management, but I'm not sure which one best describes the full lifecycle. I'll have to think this through carefully.

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Staci

10 months ago

This looks like a straightforward question on the Global Management Accounting Principles. I'll carefully read through the options and select the three that best match the principles.

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Essie

1 year ago

Ugh, I always get these MAC learning questions mixed up. Is it SA or DA? Entering or leaving? I need to brush up on my Ethernet switch fundamentals.

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Trinidad

1 year ago

B, B, B! Of course, it's B. The switch learns the MAC addresses by looking at the destination addresses of the incoming frames. This is MAC learning 101!

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Arthur

1 year ago

Hmm, I'm pretty sure it's D. As frames enter the switch, the SA is populated into the FDB. That makes sense, right? Wait, what if I'm completely off base here?

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Lynelle

1 year ago

I thought it was C. As frames leave the switch, the SA is populated into the FDB. Wait, that doesn't sound right. Let me reread the question.

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Jesus

1 year ago

B) As frames enter the switch, the DA is populated into the FDB.

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Clemencia

1 year ago

A) As frames leave the switch, the DA is populated into the FDB.

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Devora

1 year ago

B) As frames enter the switch, the DA is populated into the FDB.

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Willodean

1 year ago

A) As frames leave the switch, the DA is populated into the FDB.

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Cordell

1 year ago

The correct answer is B. As frames enter the switch, the DA is populated into the FDB. This is how MAC learning works in traditional Ethernet switches.

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Tawanna

1 year ago

D) As frames enter the switch, the SA is populated into the FDB.

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Hillary

1 year ago

C) As frames leave the switch, the SA is populated into the FDB.

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Dolores

1 year ago

B) As frames enter the switch, the DA is populated into the FDB.

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Sherron

1 year ago

B) As frames enter the switch, the DA is populated into the FDB.

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Regenia

1 year ago

A) As frames leave the switch, the DA is populated into the FDB.

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Merilyn

1 year ago

A) As frames leave the switch, the DA is populated into the FDB.

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Nida

1 year ago

User 2: Thanks for clarifying that! I always get confused with MAC learning in switches.

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Nickole

1 year ago

User 1: The correct answer is B. As frames enter the switch, the DA is populated into the FDB.

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Sarah

1 year ago

Actually, I believe MAC learning happens as frames leave the switch, not enter.

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Phyliss

1 year ago

I agree with you, the DA is populated into the FDB as frames enter the switch.

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Son

1 year ago

I think MAC learning is achieved when frames enter the switch.

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