CH9 + 10 IP Routing and Routing Protocols

Question 1

How do you show the routing table on a router

Answer 1

show ip route or sh ip route

Question 2

how do you display ARP cache on a router

Answer 2

show ip arp or sh ip arp

Question 3

Name the distance vector protocols

Answer 3

RIPv1, RIPv2, IGRP

Question 4

Name the link state routing protocols

Answer 4

OSPF, IS-IS

Question 5

Name the hybrid routing protocols

Answer 5

EIGRP, BGP

Question 6

What type of routing protocol finds the best path to a remote network by judging the hops

Answer 6

Distance vector

Question 7

____Sends routing table updates every 30 seconds, uses a hop count of max 15 to determine best route.

Answer 7

RIP, RIPv2

Question 8

___Uses classfull routing only

Answer 8

RIP

Question 9

What is not supported with RIP____,____,____

Answer 9

VSLM, authentication, discontinuous networks.

Question 10

Bellman Ford algorithm and use of a flat network is used with

Answer 10

RIP

Question 11

What routing protocol supports VSLM, and discontinuous networks?

Answer 11

RIPv2

Question 12

____ is a classless protocol that maintains two additional tables aside from the routing table

Answer 12

LInk State

Question 13

What protocol uses Dijkstra algorithm?

Answer 13

OSPF

Question 14

OSPF supports

Answer 14

IPv4, IPV6, VSLM/CIDR, unlimited hop count.

Question 15

What are the main benefits with OSPF?

Answer 15

Highly scalable
minimizes route updates
uses loopback(logical int)
VLSM
Bandwidth as path metric over hops

Question 16

What protocol floods info throughout a network of routers which then each router builds a picture of the networks topology?

Answer 16

IS-IS

Question 17

Unlike OSPF IS-IS uses ____ to provide connectionless delivery of data packets between routers

Answer 17

Connectionless Network Service(CLNS)

Question 18

Why is IS-IS preferred over OSPF by ISP’s

Answer 18

It can run IPv4 and IPv6 without creating a sep[erate database for each protocol making it much more efficient for larger networks.

Question 19

What type of protocol uses elements from distance vector and link state?

Answer 19

Hybrid

Question 20

BGP is the ___ of the internet

Answer 20

core routing protocol

Question 21

First hop redundancy protocols(FHRPs) work by

Answer 21

Giving you a way to configure more then one physical router to appear as if they where only a single logical one.

Question 22

Host standby routing protoco(HSRP) is

Answer 22

a Cisco proprietary protocol that provides a redundant gateway for hosts on a local subnet.

Question 23

What allows for two or more routers into a standby group that share same IP and MAC address

Answer 23

HSRP

Question 24

Virtual Redundancy Routing protocol(VRRP) provides

Answer 24

A redundant gateway for hosts on a local subnet; open-standard

Question 25

What allows for classless routiong

Answer 25

Variable length subnet masks(VSLM). VSLM sends the subnet mask with route updates

Question 26

A collection of networks or subnets in the same administrative domain is called an____

Answer 26

Autonomous system(AS)

Question 27

___ Is used to rate the trustworthiness of routing information received on one router from its neighboring router. 0 being the most trustworthy 255 no traffic allowed

Answer 27

Administrative distance(AD)

Question 28

What interface is most trustworthy

Answer 28

Connected interface 0

Question 29

What interface is second most trustworthy

Answer 29

Static Route 1

Question 30

External BGP has a default AD of ____

Answer 30

20

Question 31

Destination Unknown has an AD of

Answer 31

255

Question 32

Different routing protocols default AD

Answer 32

``` External BGP 255 Internal EIGRP 90 IGRP 100 OSPF 110 ISIS 115 RIP 120 External EIGRP 170 Internal BGP 200 ```

Question 33

What is the function of a distribution router?

Answer 33

They collect data from end user locations and redistribute them to an enterprise location such as a company's headquarters

Question 34

______ combines an ethernet data path with in IS-IS link state control protocol running between shortest bath bridges

Answer 34

Shortest path bridging(SPB)

Question 35

What replaces STP

Answer 35

SPB because it simplify's network creation while enabling multipath routing.