ospf

Question 1

protocols that define packet structure are known as

Answer 1

routed protocols

Question 2

protocols design for use in one AS

Answer 2

interior gateway protocol

Question 3

protocols intended for use between AS

Answer 3

exterior gateway protocol BGP

have ASNs assigned by IANA

Question 4

Kinds of IGPs

Answer 4

Distance Vector
Advanced Distance Vector i.e. eigrp
Link state i.e ospf

Question 5

what metric does rip v2 use

Answer 5

hops

Question 6

what metric used by ospf

Answer 6

the sum of all interface costs in a route, and bandwidth

Question 7

metric used by eigrp

Answer 7

uses bandwidth and delay

Question 8

Convergence of RIP, EIGRP and OSPF

Answer 8

slow fast fast

Question 9

does ripv1 support vlsm

Answer 9

no but ripv2 does

Question 10

what is ad

Answer 10

the believability of the routing protocol. WHich takes precendence. lower better

Question 11

default ad connected

Answer 11

0

Question 12

default ad static

Answer 12

1

Question 13

default ad bgp ext

Answer 13

20

Question 14

default ad eigrp internal

Answer 14

90

Question 15

default ad igrp

Answer 15

100

Question 16

default ad ospf

Answer 16

110

Question 17

default ad is-is

Answer 17

115

Question 18

default ad rip

Answer 18

120

Question 19

default ad eigrp ext

Answer 19

170

Question 20

default ad bgp iint

Answer 20

200

Question 21

default ad shcp default

Answer 21

254

Question 22

3 state ospf

Answer 22

becoming neighbours via Hellos
exchanging dbs
adding best routes (using spf)

Question 23

command to show neighbors

Answer 23

show ip ospf neighbor

Question 24

multicast addr for ospf speakers

Answer 24

224.0.0.5

Question 25

do they check their lists for LSAs they already have

Answer 25

yes

Question 26

how do you know if neighbor has failed

Answer 26

hasnt sent hello for longer than the dead interval

Question 27

do neighbors reflood every 25 mins

Answer 27

no 30 mins you dumb fuk

Question 28

OSPF use DR and BDR on ethernet links true or false

Answer 28

true

Question 29

multicast address to all DRs

Answer 29

224.0.0.6

Question 30

why do we use ospf areas

Answer 30

larger topology requires more memory

processing power required frows exponentially

Question 31

Types of LSAs in ospf area

Answer 31

Router LSA for each in the area
Network LSA for each with a DR + 1 neighbor
Summary LSA for subnet IDs in other areas

Question 32

Type 1 LSA

Answer 32

RID, ints, IP, mask, int status

Question 33

Type 2 LSA

Answer 33

DR/BDR, IPs, subnet id, mask

Question 34

Type 3 LSA

Answer 34

sub ids, mask, RID of bridge router