Eigrp Topology Table And Routing Table
FD=feasable distance - The feasible distance is the best metric to reach the destination or the best metric that was known when the route went active
AD=advertised distance - Distance advertised by the neighbor to the destination
AD = distance from the neighbor router to the destination
Simple example
R1———R2——–R3———R4—-networkx
Cost from R1 to R2 R3 R4 to network x [...]