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Cisco 400-007 Exam - Topic 6 Question 64 Discussion

Which architecture does not require an explicit multicast signaling protocol, such as PIM or P2MP, to signal the multicast state hop-by-hop, but instead uses a link state protocol to advertise the multicast forwarding state?
C) Bit indexed explicit replication
A) Binary indexed explicit routing
B) Binary intermediate enhanced routing
D) Bi-directional implicit replication

Cisco 400-007 Exam - Topic 6 Question 64 Discussion

Actual exam question for Cisco's 400-007 exam
Question #: 64
Topic #: 6
[All 400-007 Questions]

Which architecture does not require an explicit multicast signaling protocol, such as PIM or P2MP, to signal the multicast state hop-by-hop, but instead uses a link state protocol to advertise the multicast forwarding state?

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Suggested Answer: C

by Francesco at Jul 08, 2025, 11:16 PM

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Amie
8 months ago
Just to clarify, does this mean no extra signaling is needed?
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Lashonda
9 months ago
Wait, is it really C? I thought it could be D.
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Brande
9 months ago
I agree, C is the right answer!
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Linn
9 months ago
No way, it’s not D. C is the one that fits!
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Georgene
9 months ago
It's definitely C, Bit indexed explicit replication.
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Nettie
9 months ago
I vaguely remember that "bi-directional" might relate to implicit methods, so I’m leaning towards D, but I need to double-check my notes.
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Charlie
10 months ago
I’m a bit confused about the terms used here. I thought all multicast protocols needed some kind of signaling, but maybe not in this case?
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Keneth
10 months ago
This question seems similar to one we practiced on multicast routing; I feel like it might be D, but I can't recall the details.
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Cecil
10 months ago
I think I remember something about link state protocols, but I'm not sure which option fits that description.
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Gilbert
10 months ago
This question is testing our understanding of multicast routing concepts. I'll need to carefully consider each option and think about the differences between the architectures.
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Ashton
10 months ago
I'm pretty confident I know the answer to this one. The architecture that fits the description is Bit indexed explicit replication (BIER).
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Sabina
11 months ago
Okay, I think I've got this. The key is to identify the architecture that uses a link state protocol instead of an explicit multicast signaling protocol. Let me work through the options.
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Xuan
11 months ago
Hmm, I'm a bit confused by the terminology in this question. I'll need to review my notes on multicast routing architectures.
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Lacey
11 months ago
This is a tricky one. I'll need to think through the different multicast signaling protocols and how they relate to link state protocols.
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Viki
1 year ago
I don't know, but I hope the answer isn't 'all of the above' - that would be a real multicast mess!
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Brendan
1 year ago
C. Bit indexed explicit replication, because who doesn't love a good bit index?
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Sharmaine
1 year ago
I'm not sure, but I think D) Bi-directional implicit replication could also be a possibility.
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Jarvis
1 year ago
I agree with Oneida, because BIER does not require explicit multicast signaling protocols.
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Noel
1 year ago
Hmm, this question is a bit tricky. I'm going to have to think about it more.
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Casie
11 months ago
I think it's C) Bit indexed explicit replication.
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Tyra
11 months ago
C) Bit indexed explicit replication
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Delmy
1 year ago
A) Binary indexed explicit routing
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Oneida
1 year ago
I think the answer is C) Bit indexed explicit replication.
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Mireya
1 year ago
D. Bi-directional implicit replication sounds like the one that uses a link state protocol instead of multicast signaling.
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Zoila
1 year ago
B) Binary intermediate enhanced routing
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Robt
1 year ago
A) Binary indexed explicit routing
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Remedios
1 year ago
I think the answer is C. Bit indexed explicit replication doesn't require a multicast signaling protocol.
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Earnestine
1 year ago
Yes, it eliminates the need for explicit multicast signaling protocols like PIM or P2MP.
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Elza
1 year ago
That makes sense, it uses a link state protocol to advertise the multicast forwarding state.
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Fatima
1 year ago
I agree, C) Bit indexed explicit replication is the correct answer.
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