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Nokia 4A0-108 Exam - Topic 11 Question 107 Discussion

Refer to the following exhibit.PIM is using the unicast table for RPF-check and the interface IGP metrics are shown. What will happen when Router B receives the multicast packet on its interface facing Router A?
C) Forward the multicast packet out of all the interfaces in its (*,239.1.1.1) entry's outgoing interface list
A) Discard the multicast packet as RPF-check fails
B) Forward the multicast packet to Router D (RP) according to its routing table
D) Forward the multicast packet out of all the interfaces in its (192.168.1.1,239.1.1.1) entry's outgoing interface list

Nokia 4A0-108 Exam - Topic 11 Question 107 Discussion

Actual exam question for Nokia's 4A0-108 exam
Question #: 107
Topic #: 11
[All 4A0-108 Questions]

Refer to the following exhibit.

PIM is using the unicast table for RPF-check and the interface IGP metrics are shown. What will happen when Router B receives the multicast packet on its interface facing Router A?

Show Suggested Answer Hide Answer
Suggested Answer: C

by Edward at Feb 10, 2025, 07:18 PM

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Justa
9 months ago
C is the right answer, it forwards out all interfaces!
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Avery
9 months ago
Definitely B, it should forward to the RP.
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Eveline
10 months ago
Wait, are we sure about that? Seems odd.
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Ciara
10 months ago
Totally agree, that's how RPF works!
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Ocie
10 months ago
RPF-check fails, so the packet gets discarded.
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Dana
10 months ago
I think the answer might be to forward the packet out of all interfaces listed in the (*,239.1.1.1) entry. I just hope I remember the details correctly!
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Peggie
11 months ago
I feel like I’ve seen a similar scenario before. If the RPF-check fails, it should discard the packet, right? But I’m confused about the specifics of the interface metrics.
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Vernice
11 months ago
This question reminds me of a practice one where we had to analyze multicast routing. I think Router B would forward the packet to the RP, but I’m not 100% certain.
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Eleonora
11 months ago
I remember studying RPF-checks, but I'm not completely sure how it applies here. I think it might discard the packet if the check fails?
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Macy
11 months ago
Hmm, this is a good one. I think I've got a handle on multicast routing, so I should be able to work through this step-by-step and arrive at the right answer.
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Dawne
11 months ago
I'm a bit unsure about this one. The RPF-check and routing table entries are key, but I'm not entirely sure how they'll interact in this scenario. I'll need to think it through carefully.
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Carisa
11 months ago
Alright, this seems straightforward. The RPF-check is using the unicast table, and the interface IGP metrics are provided. I'm pretty confident I can determine the correct answer here.
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Ligia
11 months ago
Okay, let's see here. The question is asking what will happen when Router B receives the multicast packet on its interface facing Router A. I think I need to focus on the RPF-check and the routing table entries to figure this out.
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Burma
11 months ago
Hmm, this looks like a tricky multicast routing question. I'll need to carefully consider the RPF-check and the routing table entries to determine the correct behavior.
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Delsie
1 year ago
Wait, is this a multicast party or a unicast showdown? I'm just here for the snacks and the routing table dance moves.
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Geraldo
1 year ago
D) Forward the multicast packet out of all the interfaces in its (192.168.1.1,239.1.1.1) entry's outgoing interface list? Ooh, that's a spicy one! I bet the answer is hidden in the details.
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Bettye
1 year ago
C) Forward the multicast packet out of all the interfaces in its (*,239.1.1.1) entry's outgoing interface list? Hmm, that's an interesting approach, but I'm not sure it's the right answer.
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Izetta
1 year ago
D) Forward the multicast packet out of all the interfaces in its (192.168.1.1,239.1.1.1) entry's outgoing interface list
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Odelia
1 year ago
C) Forward the multicast packet out of all the interfaces in its (*,239.1.1.1) entry's outgoing interface list
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Nieves
1 year ago
B) Forward the multicast packet to Router D (RP) according to its routing table
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Flo
1 year ago
A) Discard the multicast packet as RPF-check fails
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Gilberto
1 year ago
B) Forward the multicast packet to Router D (RP) according to its routing table? Sounds like the safest option, but let's see what the others think.
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Tanesha
1 year ago
User 3: I'm not sure, maybe we should consider the other options as well.
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Gayla
1 year ago
User 2: I agree, forwarding the multicast packet to Router D seems like the safest option.
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Octavio
1 year ago
User 1: I think option B is the best choice.
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Jacqueline
1 year ago
A) Discard the multicast packet as RPF-check fails? That's a bold move, but maybe they're testing our understanding of RPF.
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Jeniffer
1 year ago
C) Forward the multicast packet out of all the interfaces in its (*,239.1.1.1) entry's outgoing interface list
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Elden
1 year ago
B) Forward the multicast packet to Router D (RP) according to its routing table
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Emmett
1 year ago
A) Discard the multicast packet as RPF-check fails
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Fernanda
1 year ago
But the exhibit shows the interface IGP metrics, so I still think it's B.
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Clay
1 year ago
I disagree, I believe the answer is C.
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Fernanda
1 year ago
I think the answer is B.
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