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Cisco 350-501 Exam - Topic 1 Question 131 Discussion

Refer to the exhibit:P3 and PE4 are at the edge of the service provider core and serve as ABR routers Aggregation areas are on either side of the core.Which statement about the architecture is true?
C) If each area is running its own IGP. BGP must provide an end-to-end MPLS LSP
A) If each area is running its own IGP. the ABR routers must redistribute the IGP routing table into BGP
B) To support seamless MPLS. TDP must be used as the label protocol
D) To support seamless MPLS, the BGP route reflector feature must be disabled

Cisco 350-501 Exam - Topic 1 Question 131 Discussion

Actual exam question for Cisco's 350-501 exam
Question #: 131
Topic #: 1
[All 350-501 Questions]

Refer to the exhibit:

P3 and PE4 are at the edge of the service provider core and serve as ABR routers Aggregation areas are on either side of the core.

Which statement about the architecture is true?

Show Suggested Answer Hide Answer
Suggested Answer: C

In the given architecture, if each area is running its own Interior Gateway Protocol (IGP), Border Gateway Protocol (BGP) must be used to provide an end-to-end Multiprotocol Label Switching (MPLS) Label Switched Path (LSP). This ensures that data packets can traverse through the different IGP areas seamlessly, maintaining connectivity across the entire network.


by Heike at Jun 28, 2026, 02:21 AM

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Ernie
3 days ago
I agree with C. BGP provides the necessary end-to-end connectivity.
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Jodi
8 days ago
D seems off. BGP route reflectors can be useful.
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Nu
13 days ago
A sounds right, but I’m unsure about the details.
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Rebbecca
18 days ago
I’m leaning towards C. BGP is crucial for MPLS LSP.
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Vilma
24 days ago
I think option A is correct. ABR routers need to handle IGP redistribution.
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Antonio
29 days ago
D) sounds right, route reflectors can complicate things.
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Florinda
1 month ago
C) makes sense, BGP is crucial for MPLS LSPs.
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Marci
1 month ago
Wait, TDP for MPLS? That seems outdated!
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Ronny
1 month ago
I disagree, B) is the way to go for MPLS.
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Shayne
2 months ago
A) is correct, ABR routers need to redistribute IGP into BGP.
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Thad
2 months ago
I vaguely remember something about BGP route reflectors and MPLS, but I'm uncertain if disabling them is a requirement for seamless operation.
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Bernadine
2 months ago
I feel like BGP providing an end-to-end MPLS LSP makes sense, but I need to double-check if that's always necessary when IGPs are involved.
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Hoa
2 months ago
I think I came across a similar question about MPLS and label protocols, but I can't recall if TDP is the only option for seamless MPLS.
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Dottie
2 months ago
I remember studying about ABR routers and their role in redistributing IGP into BGP, but I'm not sure if that's the only requirement.
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