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Nokia 4A0-102 Exam - Topic 6 Question 100 Discussion

Click the exhibit.Which of the following can be used by router R4 in AS 65542 to reject all routes originating in AS 65540?
B) An import policy that rejects updates with an AS Path matching the regular expression '.+ 65540'.
A) An import policy that rejects updates with an AS Path matching the regular expression '.+ 65540 .+'.
C) An import policy that rejects updates with an AS Path matching the regular expression '65540 .+'.
D) An import policy that rejects updates with an AS Path matching the regular expression '65540'.

Nokia 4A0-102 Exam - Topic 6 Question 100 Discussion

Actual exam question for Nokia's 4A0-102 exam
Question #: 100
Topic #: 6
[All 4A0-102 Questions]

Click the exhibit.

Which of the following can be used by router R4 in AS 65542 to reject all routes originating in AS 65540?

Show Suggested Answer Hide Answer
Suggested Answer: B

by Jenelle at Aug 13, 2026, 05:54 PM

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Shayne
4 days ago
C might miss some routes, not a fan of that one.
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Tabetha
9 days ago
I agree with A, it covers all bases.
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Lorean
14 days ago
Wait, can D really reject all routes? Seems too simple.
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Moon
19 days ago
I think B could work too, but not as effectively.
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Barrett
24 days ago
Option A is the best choice for rejecting all routes.
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Narcisa
29 days ago
I lean towards option D, but I can't recall if it would reject all routes effectively. It seems too simple for this scenario.
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Mozell
1 month ago
I feel like I might confuse the regex patterns. Wasn't there a practice question that asked about rejecting routes from a specific AS?
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Julene
1 month ago
I think option A is the best choice because it specifies the AS Path must include 65540 in the middle, which seems more comprehensive.
upvoted 0 times
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Willis
1 month ago
I remember we discussed AS Path filtering in class, but I'm not sure if the regex needs to match the entire path or just part of it.
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