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Cisco 300-420 Exam - Topic 2 Question 51 Discussion

An engineer is upgrading a company's main site to include a connection to a second ISP. The company will receive full Internet routing tables from both ISPs via BGP. The engineer must ensure that the company does not become a transit autonomous system. Which solution should be included in this design?
A) Tag incoming routes from both ISPs with BGP community no-export.
B) Lower the MED for updates sent to the secondary ISP.
C) Use a route-map to prevent all prefixes from being advertised to either ISP.
D) Modify the local-preference for routes incoming from the primary ISP.

Cisco 300-420 Exam - Topic 2 Question 51 Discussion

Actual exam question for Cisco's 300-420 exam
Question #: 51
Topic #: 2
[All 300-420 Questions]

An engineer is upgrading a company's main site to include a connection to a second ISP. The company will receive full Internet routing tables from both ISPs via BGP. The engineer must ensure that the company does not become a transit autonomous system. Which solution should be included in this design?

Show Suggested Answer Hide Answer
Suggested Answer: A

by Freeman at May 06, 2022, 06:16 AM

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Fernanda
10 months ago
Agree with A, no-export is crucial here!
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Chana
10 months ago
Lowering MED won't stop transit, so B is not the answer.
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Eura
11 months ago
Wait, can we really just tag routes like that? Sounds too easy.
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Johnathon
11 months ago
I think C makes more sense for preventing transit.
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Paris
11 months ago
Option A is definitely the way to go!
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Bette
11 months ago
I've used VM-Series firewalls before, and they can provide good security at the network level, so I'll include that as well.
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Lenny
11 months ago
Ah, this is a good one. I'm pretty confident I can handle this. I'll start by importing a configuration package that contains the General Posting Setup. That should give me a solid foundation to work from.
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Justa
11 months ago
I'm a bit confused on the best approach here. Should we define the target architecture first or focus on transition planning? The scenario mentions the strategic architecture is already agreed, so I'm not sure which way to go.
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Ling
11 months ago
I'm a bit confused by the wording of the question. Is there a specific reason why we can't just use the built-in CloudMonitor feature? That seems like the most straightforward and reliable option to me.
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