which router is the feasible successor?

Refer to the exhibit.

Given the output from the show ip eigrp topology command, which router is the feasible
successor?
A)

B)

C)

D)

A.
Exhibit A

B.
Exhibit B

C.
Exhibit C

D.
Exhibit D

Explanation:
To be the feasible successor, the Advertised Distance (AD) of that route must be
less than the Feasible Distance (FD) of the successor. From the output of the “show ip eigrp
topology 10.0.0.5 255.255.255.255 we learn that the FD of the successor is 41152000.
Now we will mention about the answers, in the “Composite metric is (…/…)” statement the first
parameter is the FD while the second parameter is the AD of that route. So we need to find out
which route has the second parameter (AD) less than 41152000 -> only answer B satisfies this
requirement with an AD of 128256.