Chapter 24

Question 1

equal-cost multipath (ECMP)

Answer 1

equal-cost multipath (ECMP)
A term for a router’s forwarding logic when it has more than one route for the same subnet with the same metric (cost).

Question 2

equal-cost route

Answer 2

equal-cost route
When a routing protocol computes all possible routes to one subnet, the case for which multiple of those routes have the same metric (cost).

Question 3

longest prefix match

Answer 3

longest prefix match
When a router’s IP routing table has more than one route that matches a packet’s destination address, the choice to use the matching route with the longest mask (the mask with the largest number of binary 1s in the mask).