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Question 32 - JN0-351 discussion

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Exhibit

You are receiving the BGP route shown in the exhibit from four different upstream ISPs.

Referring to the exhibit, which ISP will be selected as the active path?

A.
ISP1
Answers
A.
ISP1
B.
ISP 3
Answers
B.
ISP 3
C.
ISP 4
Answers
C.
ISP 4
D.
ISP 2
Answers
D.
ISP 2
Suggested answer: C

Explanation:

In BGP, the path selection process is based on a set of attributes1.The process starts by preferring the path with the highest weight, then the highest local preference, then the locally originated routes, and so on1.If all these attributes are the same, then it prefers the path with the shortest AS path1.

Referring to the exhibit, all four ISPs have the same weight, local preference, and origin1.However, ISP 4 has the shortest AS path1. Therefore, ISP 4 will be selected as the active path. So, option C is correct.

asked 18/09/2024
Elvis WANDJI NGASSA
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