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Nokia 4A0-100 Exam - Topic 6 Question 112 Discussion

What happens immediately after an Ethernet switch receives an Ethernet frame?
B) It records the source MAC address and the interface on which it arrived.
A) It records the destination MAC address and the interface on which it arrived.
C) It floods the frame out of all its interfaces except the interface on which the frame arrived.
D) It transmits the frame out of the appropriate interface.

Nokia 4A0-100 Exam - Topic 6 Question 112 Discussion

Actual exam question for Nokia's 4A0-100 exam
Question #: 112
Topic #: 6
[All 4A0-100 Questions]

What happens immediately after an Ethernet switch receives an Ethernet frame?

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Suggested Answer: B

by Ben at Jun 13, 2025, 04:30 PM

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Casey
7 months ago
I thought it just sent it out directly, not sure about this flooding thing.
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Paris
7 months ago
Totally agree, that's how it learns!
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Isreal
8 months ago
It definitely logs the source MAC too, that's key for the switch!
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Isaiah
8 months ago
Wait, does it really flood the frame if it doesn't know the destination?
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Eleonora
8 months ago
It records the destination MAC address and the interface it came from.
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Kiley
8 months ago
I’m leaning towards option A, but I also remember something about transmitting the frame out of the right interface. It’s confusing!
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Loren
8 months ago
I feel like the switch does something with the MAC addresses, but I can't recall if it floods the frame or just records the info first.
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Jennie
9 months ago
I remember a practice question where it asked about what happens after receiving a frame, and I think it was about flooding the frame if the destination MAC isn't known.
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Delpha
9 months ago
I think the switch first records the source MAC address, but I'm not entirely sure if it also logs the destination at that point.
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Elvera
9 months ago
I've got this one! The answer is D. The switch transmits the frame out the appropriate interface based on its forwarding table.
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Jeannine
9 months ago
Okay, let me think this through. I believe the correct answer is C - the switch floods the frame out of all its interfaces except the one it came in on. That way it can learn where devices are located on the network.
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Jaime
9 months ago
Hmm, I'm a bit unsure about this one. I think it might be A, where the switch records the destination MAC address and interface. But I'm not 100% confident.
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Silvana
10 months ago
I'm pretty sure the answer is B. The switch needs to record the source MAC address and the interface it came in on to build its forwarding table.
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Carissa
1 year ago
I believe the switch then transmits the frame out of the appropriate interface.
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Marion
1 year ago
I agree with Goldie. It helps the switch determine where to forward the frame.
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Gregoria
1 year ago
D? Really? The switch doesn't transmit the frame, it just forwards it out the appropriate interface. These options are a bit off.
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Antonio
1 year ago
C is the correct answer. Ethernet switches flood frames out of all interfaces except the one they came in on until they learn the destination MAC address.
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Patti
11 months ago
C is the correct answer.
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Lauran
11 months ago
It does this until it learns the destination MAC address.
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Douglass
1 year ago
The switch floods frames out of all interfaces except the one they came in on.
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Goldie
1 year ago
I think the switch records the destination MAC address and the interface on which it arrived.
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Valentin
1 year ago
Wait, isn't the switch supposed to be a 'smart' device? Flooding everything except the input port seems kind of dumb to me.
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Reita
11 months ago
Once the switch learns the MAC address, it will then forward future frames directly to that port.
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Cassie
11 months ago
This helps ensure the frame reaches its intended destination, even if the switch doesn't have the destination MAC address in its table.
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Kiley
12 months ago
It's actually a common practice for switches to flood frames to all ports except the one it was received on.
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Lashawn
1 year ago
I think the answer is B. Ethernet switches need to learn the source MAC addresses and the interfaces they come in on to build their forwarding tables.
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Jamika
1 year ago
After that, the switch will update its forwarding table with the source MAC address and port information.
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Tegan
1 year ago
Yes, you are correct. The switch will examine the source MAC address and the port it came from.
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