Refer to the exhibit. On the basis of the configuration that is provided, how would the BGP
updates that come from router R1 be replicated inside autonomous system 65200?
A.
All BGP updates that are received on router R2 willbe sent to routers R3 and R4.
Routers R3 and R4 will then forward those BGP updates to router R5.
B.
All BGP updates that are received on router R2 willnot be sent to routers R3 and R4.
C.
All BGP updates that are received on router R2 willbe sent directly to router R5.
D.
None of the BGP updates that are received on routerR2 will ever be received by router
R5.
Explanation:
All BGP updates that are received on router R2 willbe sent to routers R3 and R4 but R3 &
R4 will not forward those BGP updates to R5. This is called theBGP split-horizon rule
(which states that a route learned from one IBGP neighbor will not be advertised to another
IBGP neighbor) -> A is not correct.
The BGP updates received on router R2 will be sent to R3 and R4 without violating the BGP
split-horizon rule because R2 receives updates froman EBGP (R1), not IBGP -> B is not
correct.
From the configuration of R2, we learn that R2 did not establish neighbor relationship with
R5 so they are not neighbors -> no BGP updates willbe sent from R2 to R5 -> C is not
correct.
The BGP split-horizon rule prevents updates received on R2 from being sent to R5 -> D is
correct.