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350-401 Practice Question: Which three statements about BGP route reflectors…
Which three statements about BGP route reflectors are true? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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Route reflectors reduce the number of required iBGP sessions in an AS.
Route reflectors reduce the number of required iBGP sessions by allowing clients to peer only with the route reflector. The route reflector does not modify the AS_PATH or NEXT_HOP attributes when reflecting routes, preserving path information. The ORIGINATOR_ID attribute is used to prevent routing loops by identifying the originator of a route. Option E is incorrect because non-client peers of a route reflector do not need to be fully meshed; they may be clients of other route reflectors, and the full mesh requirement applies only to iBGP speakers that are not clients of any route reflector.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Route reflectors reduce the number of required iBGP sessions in an AS.
Why this is correct
Correct because route reflectors allow a hub-and-spoke topology, reducing sessions.
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A route reflector client must be fully meshed with all other clients.
Why it's wrong here
Incorrect because clients only need to peer with the route reflector, not with each other.
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The route reflector does not modify the AS_PATH or NEXT_HOP attributes when reflecting routes.
Why this is correct
Correct because the route reflector preserves these attributes.
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The ORIGINATOR_ID attribute is used to prevent routing loops in a route reflector environment.
Why this is correct
Correct because ORIGINATOR_ID identifies the originator of the route and helps prevent loops.
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Non-client peers of a route reflector must be fully meshed with each other.
Why it's wrong here
Incorrect. Non-client peers of a route reflector do not need to be fully meshed with each other; they may be clients of other route reflectors, and the full mesh requirement applies only to iBGP speakers that are not clients of any route reflector.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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