3.1 Routing Concepts

Question 1

How do routers choose the routing protocol?

Answer 1

By the administrative distance

Question 2

What are the Administrative Distances of popular routing protocols?

Answer 2

Direct connection = 0
Static = 1
EIGRP = 90
EIGRP Summary Route = 5
OSPF = 110
RIP = 120

Question 3

NBTSTAT

Answer 3

Displays protocol statistics and current TCP/IP connections using NETBIOS

Question 4

NETSTAT

Answer 4

shows statistics since the server was booted. Also displays protocol statistics and current TCP/IP connections.

Question 5

Split Horizon

Answer 5

Information can’t be sent back to the source.

Question 6

Route Poisoning

Answer 6

Downed route given infinite/invalid metrics

Question 7

Holddowns

Answer 7

prevent update messages from reinstating downed route

Question 8

RIP

Answer 8

1. Sends complete routing table every 30 seconds
2. Max hop count of 15

Question 9

IGRP

Answer 9

1. Cisco Proprietary (distance-vector)
2. Sends complete routing table every 90 seconds
3. Max hop count o 255

Question 10

EIGRP

Answer 10

1. Advanced distance vector routing protocol (hybrid)
2. Rapid convergence and multiple protos supported
3. Incremental routing updates