Deck 19: Understanding OSPF Concepts

Question 1

Which Cisco IOS command is used to display the current OSPF neighbors and their RIDs?

A) show ip ospf neighbor
B) show ospf neighbors
C) show interface ospf neighbors
D) show ip interface ospf neighbors

Answer 1

show ip ospf neighbor

Question 2

In which OSPF state would a neighbor be if it has learned of a neighbor's existence but has not yet seen its own RID in an LSDB update?

A) Loading
B) Down
C) Init
D) 2-way

Answer 2

Init

Question 3

When a pair of OSPF neighbors has reached the ________ state, they can exchange their LSDB with each other.

A) Loading
B) Down
C) Init
D) 2-way

Answer 3

2-way

Question 4

What type of OSPF packet is used to list the LSAs that are known by a device?

A) DD
B) LSU
C) LSR
D) LSA

Question 5

What type of OSPF packet is used to actually send LSAs between neighbors?

A) DD
B) LSU
C) LSR
D) LSA

Question 6

What default length is used for the OSPF dead interval?

A) 20 seconds
B) 40 seconds
C) 4 times the Hello Interval
D) 120 seconds

Question 7

What term does OSPF use to reference a router that has interfaces in more than one area?

A) ASBR
B) Backbone
C) Internal
D) ABR

Question 8

A(n) ________ is a routing protocol that was designed and intended for use inside a single autonomous system.

A) IGP
B) EGP
C) BGP
D) IXR

Question 9

Which routing protocols are not considered Distance Vector?

A) RIP
B) OSPF
C) EIGRP
D) IGRP

Question 10

Which components are used as part of EIGRP's default metric?

A) Hop Count
B) Link Reliability
C) Bandwidth
D) Delay

Question 11

Which IGP routing protocol has traditionally been Cisco proprietary?

A) EIGRP
B) OSPF
C) RIP
D) IS-IS

Question 12

Which Cisco IOS command is used to list information about the OSPF LSDB on a device?

A) show ip ospf lsdb
B) show ip ospf topology
C) show ip ospf database
D) show ip ospf lsa

Question 13

Which IP multicast address is used by OSPF to communicate with all OSPF speaking routers?

A) 224.0.0.10
B) 224.0.0.2
C) 224.0.0.6
D) 224.0.0.5

Question 14

Each OSPF router that originates an LSA is responsible for reflooding it every ________.

A) 30 minutes
B) 60 minutes
C) 120 minutes
D) 15 minutes

Question 15

Which of the following is a routing protocol designed and intended for use between different autonomous systems?

A) IGP
B) EGP
C) BGP
D) IXR

Question 16

What is the default administrative distance IGRP routes?

A) 1
B) 20
C) 100
D) 110

Question 17

Which term does OSPF use to describe the special OSPF area to which all other areas must connect?

A) Area border router
B) Backbone area
C) Interarea
D) Area