CCNA 3 Labs and Study Guide - BINARYBB.INFO – @jagalbraith

176 Switching Basics and Intermediate Routing CCNA 3 Labs and Study Guide
Study Guide
EIGRP Concepts
EIGRP is the enhanced version of the Cisco-proprietary Interior Gateway Routing Protocol (IGRP). The
speed of convergence, ease of configuration, and blending of the best of both distance vector and link-state
routing protocols make EIGRP the most powerful of IGPs. To get the absolute best of both worlds, use
EIGRP if all of your equipment is from Cisco.
The exercises in this section walk you through the terminology and concepts of EIGRP. Pay particular
attention to the similarities and differences between EIGRP and other routing protocols.
Vocabulary Exercise: Matching
Directions: Match the definition on the left with a term on the right. This exercise is not necessarily a oneto-one
matching. Some definitions may be used more than once and some terms may have multiple definitions.
However, all terms and definitions are used.
Definition
a. table that includes route entries for all destinations
that the router has learned
b. a route selected as the primary route to reach
a destination
c. table that ensures bidirectional communication
between each of the directly connected
neighbors
d. a backup route kept in the topology table in
case the primary route goes down
e. used by EIGRP to discover, verify, and rediscover
neighbor routers
f. a route that is in a reachable and operational
status
g. guarantees loop-free operation at every
instant throughout a route computation and
allows all devices involved in a topology
change to synchronize at the same time
h. table in which EIGRP places the routes it
chooses from the topology table as the best
(successor) routes to a destination
i. status of a route that has no feasible successors
yet; router is waiting on replies from
EIGRP routers
j. used by EIGRP to guarantee ordered delivery
of EIGRP packets to all neighbors
k. used when a router discovers a new neighbor
l. used when a router needs specific information
from one or all of its neighbors
Term
d feasible successor
e hello packets
g Diffusing Update Algorithm
j Reliable Transport Protocol
c neighbor table
k update packet
a topology table
l query packet
b successor
h routing table
i active state
f passive state