JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing (2023) — Question 37

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

Answer options

• A. A route learned by EBGP will be re-advertised to IBGP peers.
• B. A route learned by IBGP will not be re-advertised to IBGP peers.
• C. A route learned by IBGP will be re-advertised to IBGP peers.
• D. A route learned by EBGP will not be re-advertised to IBGP peers.

Correct answer: A, B

Explanation

The correct answers are A and B because BGP is designed to re-advertise routes learned via EBGP to IBGP peers, while routes learned through IBGP are not propagated to other IBGP peers to prevent routing loops. Options C and D are incorrect because they misrepresent BGP's route propagation rules.