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Cisco 300-510 Exam - Topic 6 Question 123 Discussion

Posted by Virgie on May 02, 2026 at 10:27 AM

Refer to the exhibit.

An engineer applied the configuration on R1 to prevent network 192.168.1.0/24 from being propagated outside of area 5. After the change, users have reported they are not able to access any of the application servers that were working before. While checking the routing table of the peer router. The engineer notices R1 stopped propagating any routes outside are 5. Which action must be taken to fix the problem?

Suggested Answer: D

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25 comments · newest first
AN
Antonio 7 days ago
True, but we need to restore access quickly. D is my pick!
JA
Jacinta 12 days ago
I’m worried about the implications of option A. It might open too much.
CE
Celeste 17 days ago
Definitely! We can't just deny everything. Option D seems safest.
AN
Antonio 22 days ago
I feel like option C is too restrictive. We need to allow access.
ER
Erick 27 days ago
I think option A might work too. Allowing external routers could help.
LA
Lamonica 1 month ago
I'm leaning towards option D. Adding a permit statement could solve the issue.
VI
Vivan 1 month ago
I agree! Option B seems logical to me. Inbound direction is crucial.
VI
Viva 1 month ago
This question is tricky! I feel like I need to analyze the options carefully.
PE
Pearly 2 months ago
That’s a good point. We need to balance security and functionality.
KE
Kelvin 2 months ago
Maybe a combination of B and D? That could cover both bases.
CA
Caprice 2 months ago
Right, but if we don’t fix the inbound filter, users will still be blocked.
ED
Edda 2 months ago
True, but we need to allow necessary routes. B seems safer though.
PE
Pearly 2 months ago
I’m not sure about D. What if it opens up too much traffic?
KE
Kelvin 2 months ago
I’m leaning towards option D. Adding a permit statement could solve the access problem.
CA
Caprice 3 months ago
Agreed! I think option B makes sense. It addresses the inbound direction issue.
ED
Edda 3 months ago
This question is tricky. I feel like it's testing our understanding of routing filters.
VA
Valentin 3 months ago
Just to clarify, the filter-list was blocking everything, right?
VE
Vesta 3 months ago
Option D could also work, but it feels a bit risky.
DE
Deeanna 3 months ago
Wait, why would we need to allow external routers into area 5?
JE
Jeanice 3 months ago
Totally agree, B is the way to go!
TA
Tamala 4 months ago
I think option B makes the most sense here.
TH
Thea 4 months ago
I think we learned that explicit deny statements can help clarify routing issues. Maybe option C could be a solution, but I'm not entirely confident.
CA
Caprice 5 months ago
I feel like I might have mixed up the direction of the filter-list. Was it supposed to be inbound or outbound? I can't recall clearly.
LA
Latosha 6 months ago
This question seems similar to the practice questions where we had to adjust prefix-lists. I think option D might be the right choice to allow all traffic.
JO
Joanna 6 months ago
I remember we discussed filter-lists in class, but I'm not sure if I should be looking at inbound or outbound configurations here.
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