A company uses Routers R1 and R2 to connect to ISP1 and ISP2, respectively, with
Routers I1 and I2 used at the ISPs. R1 peers with I1 and R2; R2 peers with I2 and R1.
Assuming as many default settings as possible are used on all four routers, which of the
following is true about the next-hop IP address for routes R1 learns over its iBGP connection
to R2?

A.
The next hop is I2’s BGP RID.

B.
The next hop is I2’s IP address used on the R2-I2 neighbor relationship.

C.
The next hop is R2’s BGP RID.

D.
The next hop is R2’s IP address used on the R1–R2 neighbor relationship.

Explanation:

By default, when a router advertises an iBGP route, it leaves the Next-Hop PA unchangeD.
By default, R2’s next hop for routes learned from I2 will be I2’s IP address used on the R2–I2
neighbor relationship.