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Nokia 4A0-112 Exam - Topic 4 Question 4 Discussion

Consider the exhibit.All routers are running IS-IS with IPv6 support enabled. Based on the topology shown, and the route tables of routers R3 and R4, which of the following statements is TRUE?
D) Route leaking is configured on both routers R1 and R2.
A) There is no route leaking configured on router R1 or router R2.
B) Route leaking is configured on router R1 but not on router R2.
C) Route leaking is configured on router R2 but not on router R1.

Nokia 4A0-112 Exam - Topic 4 Question 4 Discussion

Actual exam question for Nokia's 4A0-112 exam
Question #: 4
Topic #: 4
[All 4A0-112 Questions]

Consider the exhibit.

All routers are running IS-IS with IPv6 support enabled. Based on the topology shown, and the route tables of routers R3 and R4, which of the following statements is TRUE?

Show Suggested Answer Hide Answer
Suggested Answer: D

From the route tables of R3 and R4, we can see that remote routes are present, with R3 and R4 both having routes referencing routers in different areas (Area 49.01 and 49.02). These remote routes are characteristic of route leaking, which is the process of sharing routes between different IS-IS areas.

R3 has routes for R1, R2, and R4, which are in Area 49.01, suggesting that R1 and R2 have advertised their routes to R3, possibly due to route leaking.

R4 has similar routes for R2 and R3, indicating that R2 might have advertised its routes to R4.

This sharing of routes between areas is indicative of route leaking being configured on both R1 and R2, allowing these routes to be shared across the areas.


by Sherron at Jan 28, 2025, 04:13 AM

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Alisha
9 months ago
Wait, are we sure about A? That seems too simple!
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Allene
9 months ago
D is just wrong, both routers are clean!
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Sherita
9 months ago
C seems unlikely, I doubt R2 has any leaks.
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Jamie
10 months ago
I think B could be right, but I’m not sure.
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Helaine
10 months ago
A is definitely true, no leaks on R1 or R2.
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Maile
10 months ago
I feel like option A could be the right answer since it mentions no route leaking, but I need to double-check the route tables again.
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Kenia
10 months ago
If I recall correctly, route leaking means that routes from one area can be shared with another. I just can't remember if it applies to both routers here.
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Leigha
10 months ago
I think I saw a similar question in our practice tests where we had to identify route leaking configurations. It was tricky!
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Lazaro
11 months ago
I remember studying route leaking, but I'm not entirely sure how it applies to R1 and R2 in this case.
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Stephen
11 months ago
I'm not sure about this one. The topology is a bit complex, and I'm not entirely familiar with the details of IS-IS routing. I'll need to take my time and think it through step-by-step.
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Roosevelt
11 months ago
Okay, I think I've got this. Based on the information provided, the correct answer is option D - route leaking is configured on both routers R1 and R2.
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Buddy
11 months ago
Hmm, I'm a bit confused by the concept of route leaking. I'll need to review my notes on that before I can confidently answer this question.
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Yuonne
11 months ago
This looks like a tricky question about IS-IS routing and route leaking. I'll need to carefully analyze the topology and the route tables to determine the correct answer.
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Tennie
2 years ago
Come on, this is an easy one. The answer is clearly D. Why else would we have this fancy topology diagram, if not to test our route leaking knowledge?
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Lenna
2 years ago
Because both routers need to have route leaking configured for the topology to work.
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Josephine
2 years ago
Haha, this question is a real brain-teaser! I'm going to guess B, just to keep things interesting.
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Mona
2 years ago
Hmm, this one's tricky. I'm going to go with C. Route leaking is only configured on R2, not R1.
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Adolph
1 year ago
User3: I'm going with C. Route leaking is only configured on R2, not R1.
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Princess
1 year ago
User2: I disagree, I believe it's D. Route leaking is configured on both R1 and R2.
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Nettie
1 year ago
User1: I think it's A. There is no route leaking configured on either R1 or R2.
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Chauncey
2 years ago
Why do you think it's D?
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Lenna
2 years ago
I disagree, I believe it's D.
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Laurel
2 years ago
I think the answer is D. Both routers R1 and R2 have route leaking configured, which is the only way to get the routes advertised between the two IS-IS domains.
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Rutha
2 years ago
Yes, that makes sense. Route leaking is necessary for the routes to be shared between the two domains.
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Malika
2 years ago
I agree with you, the answer is D. Both routers must have route leaking configured for the routes to be advertised between the two IS-IS domains.
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Chauncey
2 years ago
I think the answer is A.
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