Nokia Exam 4A0-C04 Topic 1 Question 80 Discussion

Actual exam question for Nokia's 4A0-C04 exam

Question #: 80
Topic #: 1

A confederated AS is comprised of three members. One member is comprised of 4 routers, while the other two members are comprised of 3 routers each. Assuming member ASs are fully meshed and use full mesh iBGP, what is the required number of BGP sessions within the confederation?

A12

B13

C14

D15

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Suggested Answer: D

by Latanya at Mar 20, 2025, 09:18 AM

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Marjory

1 days ago

Whoa, this is a tricky one! Let me see... Okay, I've got it - the answer is C) 14. Gotta love those BGP sessions, am I right?

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Della

3 days ago

Definitely C) 14. This is a classic confederation topology problem, and the math checks out. Nice try with the other options, though!

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Chaya

16 days ago

Because each router in the fully meshed member ASs needs to establish a session with every router in the other member ASs, so it's 4 routers x 3 routers + 3 routers x 3 routers = 12 + 9 = 21. But since iBGP sessions are not required within the same member AS, we subtract 7 (3 routers x 2 sessions) to get 14.

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Rodrigo

17 days ago

Why do you think it's 14?

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Chaya

18 days ago

I disagree, I believe the answer is C) 14.

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Elmira

23 days ago

I think the answer is C) 14. It makes sense since each member AS has a full mesh of iBGP sessions, and with three members, that's 9 sessions plus the 5 sessions between the members.

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Shaunna

3 days ago

I agree, the answer is C) 14. Each member AS has a full mesh of iBGP sessions.

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Rodrigo

26 days ago

I think the answer is A) 12.

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