Exam 300-420 topic 1 question 31 discussion

Actual exam question from Cisco's 300-420

Question #: 31
Topic #: 1

Refer to the exhibit. AS65533 and AS65530 are announcing a partial Internet routing table as well as their IP subnets. An architect must create a design that ensures AS64512 does not become a transit AS. Which filtering solution must the architect choose?

A. no-advertise
B. next-hop
C. no-export
D. maximum-prefix

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Suggested Answer: C 🗳️

by cwoolie at March 27, 2022, 1:57 p.m.

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andrewChan

Highly Voted 1 year, 9 months ago

Selected Answer: C

4 methods how you can prevent becoming a transit AS: 1 Filter-list with AS PATH access-list. 2 No-Export Community. 3 Prefix-list Filtering 4 Distribute-list Filtering

upvoted 5 times

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Clauster

Most Recent 1 year ago

Selected Answer: C

Again, the no-export is used for eBGP ONLY the no-advertised is used on both iBGP and eBGP. When the question strictly refers to or assumes to be eBGP only please only use no-export. In this question this is obviously eBGPs

upvoted 2 times

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