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Cisco 400-007 Exam - Topic 2 Question 68 Discussion

Refer to the exhibit.The enterprise customer wants to stream one-way video from their head office to eight branch offices using multicast. Their current service provider provides a Layer3 VPN solution and manages the CE routers, but they do not currently support multicast. Which solution quickly allows this multicast traffic to go through while allowing for future scalability?
B) Enable a GRE tunnel between nodes C2 and C4
A) Enable a GRE tunnel between nodes CE1 and CE2
C) Enable a GRE tunnel between nodes C1 and C4
D) Implement hub and spoke MPLS VPN over DMVPN (also known as 2547o DMVPN) between CE1 and CE2
E) The service provider must provide a Draft Rosen solution to enable a GRE tunnel between nodes PE1 and PE2

Cisco 400-007 Exam - Topic 2 Question 68 Discussion

Actual exam question for Cisco's 400-007 exam
Question #: 68
Topic #: 2
[All 400-007 Questions]

Refer to the exhibit.

The enterprise customer wants to stream one-way video from their head office to eight branch offices using multicast. Their current service provider provides a Layer3 VPN solution and manages the CE routers, but they do not currently support multicast. Which solution quickly allows this multicast traffic to go through while allowing for future scalability?

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Suggested Answer: B

by Clay at Nov 19, 2025, 03:43 PM

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Marica
5 months ago
I feel D is the most reliable for future needs.
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Adelle
5 months ago
E could be a solution too, but it depends on the provider.
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Lajuana
5 months ago
A might work, but it lacks future scalability.
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Rolland
5 months ago
But what about option A? It’s a simpler setup.
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Dorathy
5 months ago
I agree, D seems to handle multicast well.
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Jaclyn
6 months ago
A GRE tunnel between CE1 and CE2 sounds right to me!
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Carissa
6 months ago
Wait, can the service provider even support that?
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Ruthann
6 months ago
I think D is the best option for scalability.
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Dorsey
7 months ago
Option D looks like the way to go - MPLS VPN over DMVPN should provide the flexibility they need.
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Deonna
7 months ago
Haha, I bet the service provider is dreading this customer's request for multicast support!
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Lashawnda
7 months ago
The Draft Rosen solution in option E sounds interesting, but I'm not sure if the service provider will be willing to implement it.
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Ryann
7 months ago
I'm not sure about the GRE tunnel options - they seem a bit complicated for this scenario.
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Pamella
7 months ago
Option D seems like the most scalable solution, allowing for future growth.
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Laila
7 months ago
I vaguely remember that Draft Rosen solutions are important for GRE tunnels, but I don't know if that's the right choice here.
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Laquita
8 months ago
I practiced a similar question about multicast routing, and I feel like enabling a GRE tunnel could be a quick fix, but I’m unsure which nodes to choose.
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Aliza
8 months ago
I think the hub and spoke MPLS VPN option might be the best for scalability, but I can't recall the specifics of how it works.
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Nan
8 months ago
I'm not too familiar with Draft Rosen, so I'll need to research that a bit more before deciding if that's the right approach.
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Carmela
8 months ago
I think the MPLS VPN over DMVPN option might be the best bet here. It sounds like it could handle the multicast requirement while also being scalable.
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Theola
8 months ago
Okay, the key seems to be finding a solution that supports multicast while allowing for future scalability. I'll need to weigh the pros and cons of each option.
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Marguerita
8 months ago
GRE tunnels are a solid choice for multicast traffic.
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Marg
9 months ago
I remember we discussed GRE tunnels in class, but I'm not sure which nodes to connect for multicast.
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Jonelle
9 months ago
I think option D is the best choice. It allows for scalability.
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Fallon
9 months ago
Not sure if this will really work for all eight branches.
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Desmond
9 months ago
Hmm, I'm a bit confused about the different VPN and tunneling options here. I'll need to make sure I understand the differences between them.
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Eleonore
10 months ago
This seems like a tricky multicast question. I'll need to carefully review the options and think through the requirements.
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Kirk
4 months ago
Multicast can be complicated, but we’ll figure it out!
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Kerry
4 months ago
I’m leaning towards option E for the Draft Rosen solution.
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Mozell
4 months ago
GRE tunnels seem like a solid choice too.
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Ryan
5 months ago
I think option D could be the best for scalability.
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Ben
9 months ago
This is definitely a tricky one!
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