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Nokia 4A0-108 Exam - Topic 7 Question 45 Discussion

What is the first action a router performs when it receives a multicast packet?
D) It performs an RPF check on the packet.
A) It determines if it is the DR for that segment.
B) It checks the PIM source group database for the matching group.
C) It sends a PIM Assert message to the RP.
E) It sends an IGMP join to the source.

Nokia 4A0-108 Exam - Topic 7 Question 45 Discussion

Actual exam question for Nokia's 4A0-108 exam
Question #: 45
Topic #: 7
[All 4A0-108 Questions]

What is the first action a router performs when it receives a multicast packet?

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Suggested Answer: D

by Kimbery at May 08, 2022, 08:01 AM

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Glory
7 months ago
Nah, it’s definitely not E.
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Fernanda
7 months ago
Surprised to see so many people picking B!
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Marisha
7 months ago
Wait, I thought it was D?
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Ronnie
8 months ago
Totally agree, B is the right answer!
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Noel
8 months ago
It checks the PIM source group database first!
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Linwood
8 months ago
I think it has to do with IGMP joins, but I remember something about PIM messages too. This is tricky!
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Chanel
8 months ago
I feel like the router needs to determine if it's the DR first, but I could be mixing that up with another concept.
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Ryann
8 months ago
I think the first action might be related to checking the PIM database, but I'm not entirely sure if that's the first step.
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Precious
8 months ago
I remember practicing a question about RPF checks, but I can't recall if that's what happens first with multicast packets.
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Elise
8 months ago
Okay, let me think this through. I know the board has oversight responsibilities, but I'm not sure if they have direct responsibility for internal controls. I'll have to carefully consider each option.
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Irene
8 months ago
Hmm, I remember reading about service subdivisions; maybe it's 'sub-inventories'? That feels close.
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