Juniper JN0-363 Exam - Topic 8 Question 60 Discussion

Actual exam question for Juniper's JN0-363 exam

Question #: 60
Topic #: 8

[All JN0-363 Questions]

Which two statements are correct about the way that BGP propagates routes by default? (Choose two.)

AA route learned by EBGP will be re-advertised to IBGP peers.

BA route learned by IBGP will not be re-advertised lo IBGP peers.

CA route learned by EBGP will not be re-advertised to IBGP peers.

DA route learned by IBGP will be re-advertised to IBGP peers.

Show Suggested Answer

Suggested Answer: A, B

By default, BGP will propagate routes learned from EBGP peers to other IBGP peers. However, due to the BGP split-horizon rule, routes learned from one IBGP peer are not re-advertised to another IBGP peer. This behavior is designed to prevent routing information loops within the same AS.

Juniper Networks documentation on BGP: BGP Route Propagation and Selection

by Izetta at Aug 05, 2025, 04:02 AM

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Milly

5 months ago

EBGP routes get re-advertised to IBGP, that's correct.

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Ayesha

5 months ago

Totally agree with that!

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William

6 months ago

Wait, really? I thought IBGP routes could be shared.

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Nicolette

6 months ago

Yup, B is definitely true!

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Charolette

6 months ago

A route learned by IBGP won't be re-advertised to IBGP peers.

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Tracey

6 months ago

I'm not confident, but I think IBGP routes are supposed to stay within the same AS and not be re-advertised. That sounds like option B again.

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Francoise

7 months ago

I feel like I might be mixing up the rules, but I think EBGP routes can be sent to IBGP peers. Maybe that's option A?

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Adaline

7 months ago

I practiced a similar question, and I believe that IBGP routes aren't re-advertised to other IBGP peers. That might be option B.

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Alaine

7 months ago

I think I remember that routes learned from EBGP can be shared with IBGP peers, but I'm not entirely sure if that's always the case.

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Dulce

7 months ago

I've got a good handle on this topic. The key is that EBGP routes are re-advertised to IBGP peers by default, but IBGP routes are not re-advertised to other IBGP peers by default. That should help me identify the two correct statements.

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Mayra

7 months ago

I'm a bit confused on the difference between re-advertising and not re-advertising routes. I'll need to review my BGP notes to make sure I have that distinction clear.

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Maurine

8 months ago

Okay, let me think this through. I know EBGP is for external BGP peers, and IBGP is for internal BGP peers. I think the key is understanding the default behavior for route propagation in each case.

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Jerry

8 months ago

This question seems straightforward, but I want to make sure I understand the key differences between EBGP and IBGP before answering.

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Abel

9 months ago

I agree with Maricela, but I also think option D is correct because IBGP routes are re-advertised to IBGP peers.

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Lorita

10 months ago

B and C seem right to me. I don't want to re-advertise routes learned from my IBGP peers to other IBGP peers, that would just create routing loops. And EBGP routes definitely shouldn't go back out to IBGP.

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Beatriz

8 months ago

I agree, BGP routes learned from IBGP peers should not be re-advertised to other IBGP peers.

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Maricela

10 months ago

I think option A is correct because EBGP routes are re-advertised to IBGP peers.

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Mitsue

10 months ago

Hmm, I'm not too sure about this one. I know there's some weird BGP behavior with route propagation, but I can never keep it straight. Maybe I should have studied that section more during my preparation.

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Bernardine

10 months ago

I think the correct answers are A and D. It makes sense that a route learned from an external BGP peer would be propagated to internal BGP peers, but not the other way around.

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