Which routing protocol needs the administrator must manually update entry whenever an internetwork topology change requires an update? Static route

droppercauseNetworking and Communications

Oct 28, 2013 (3 years and 8 months ago)

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Which

routing protocol needs t
he administrator must manually update entry whenever
an internetwork topology change requires an update?

Static route


Which

routing protocol
can

automatically updated by a routing process whenever new
information is received
from the internetwork?

Dynamic route


State two advantage of static route

1.

security reasons

-

hide parts of an internetwork

2.

stub network. Configuring static routing to a stub network avoids the overhead of

dynamic routing.


Consider the following routing t
able

Network Number

Interface

172.16.1.0

E0

192.168.1.0

E1

172.16.3.0

S0

Default

S1


Which interface will the use when trying to access IP 172.16.3.254?

S0


Which interface will the use when trying to access IP 172.16.1.1?

E0


Which interface will the

use when trying to access IP 172.16.2.16?

S1


Which interface will the use when trying to access IP 192.168.1.256?

Error Message of Wrong IP number


If
path between
r
outers

A and B is down, what is the effect of the followings?

Static Route :
communicatio
n with the destination network is impossible

until
Router

A is manually reconfigured to relay packets by way of Router B



Dynamic Route :
it adjusts its routing table, making the path through Router B the

preferred path to the destination. The routers c
ontinue sending packets over this link.




When a routing algorithm updates a routing table
, what will it do?

To
determine the best information to include in the table. Each routing algorithm

interprets what is best in its own way. The algorithm generates

a number, called the

metric value, for each path through the network.


What is a metric value?

Value that use for find
the better the path

of a routing protocol.


Name five common
characteristics

to generate a metric value

Bandwidth

Delay

Load

Reliabili
ty

Hop Count

Ticks

Cost




Why
convergence

of network is important?

it reduces the period of time in which routers would continue to make

incorrect/wasteful routing decisions.



When
network changes because of growth, reconfiguration, or failure, the ne
twork
knowledge base

should?

Changed



State methods to solve the
routing loops

of distance vector?

defining a maximum

split horizon

hold
-
down timers


Routers

Exchange

LSAs with each other.

State the Difference between

Distance
-
vectors and Link
-
s
tate routing protocols


Distance
-
vectors

Link
-
state

What can
it do?

View network topology
from neighbors
perspective

Gets common view of entire
network topology

Principle

Adds distance vectors
from router to router


Calculates the shortest path to other

routers

Convergence

Frequent, periodic
updates:Slow
convergence


Event
-
triggered updates:Faster
convergence

Things to Pass

Passes copies of routing
tables to neighbor routers


Passes link
-
stat routing updates to
other routers



Which
Routing Protocols

will be best ? Give an example

Hybrid routing protocols
, EIGRP



State
three different ways
for
routers
to
learn paths to destinations

static routes

default routes

dynamic routing



Under what situation will a router enter setup mode?

if the router is una
ble to locate a valid startup
-
config file, it enters an initial router

configuration mode called setup mode.




What information you need to provide to a router interface?

a router must refer to entries about networks or subnets that are directly connecte
d to

it. Each interface must be configured with an IP address and a mask




Which

command can a cisco router define a static route?




State a common distance vector IP routing protocol?

RIP



What information are involved during
an IP routing protocol t
he setting
?

Global tasks include selecting a routing protocol, either RIP or IGRP

The interface task is to assign network/subnet addresses and the appropriate subnet

mask



How to define a routing protocol to a cisco router?

Use command router [protocol]


How to perform the interface task to a cisco router

Use command network