CCNA2: Ch 8: Single-Area OSPF

Question 1

Which OSPF component is identical in all routers in an OSPF area after convergence?

Answer 1

link-state database

Question 2

Which three [3] statements describe features of the OSPF topology table?

Answer 2

1. When converged, all routers in an area have identical topology tables.
2. It is a link-state database that represents the network topology.
3. The table can be viewed via the show ip ospf database command.

Question 3

A router is participating in an OPSFv2 domain. What will always happen if the dead interval expires before the router receives a hello packet from an adjacent DROTHER OPSF router?

Answer 3

OSPF will remove that neighbor from the router link-state database.*

Question 4

Which command will provide information specific to OSPFv3 routes in the routing table?

Answer 4

show ipv6 route ospf*

Question 5

Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?

Answer 5

0.0.0.31

Question 6

A network administrator enters the command ipv6 router ospf 64 in global configuration mode. What is the result of this command?

Answer 6

The OSPFv3 process will be assigned an ID of 64

Question 7

The election of a DR and a BDR takes place on ____ networks, such as Ethernet networks.

Answer 7

multiaccess

Question 8

OSPF uses ”_____” as a metric

Answer 8

cost

Question 9

Which command should be used to check the OSPF process ID, the router ID, networks the router is advertising, the neighbors the router is receiving updates from, and the default administrative distance?

Answer 9

show ip protocols

Question 10

Which OSPFv3 function works differently from OSPFv2?

Answer 10

authentication

Question 11

To quickly verify OSPFv3 configuration information including the OSPF process ID, the router ID, and the interfaces enabled for OSPFv3, you need to issue the command _____

Answer 11

show ipv6 protocols

Question 12

What is the four [4] precedence order selection of a router ID for an OSPF enabled router?

Answer 12

1. configure router ID number
2. Loopback interface IP address
3. Lookback interface address
4. Serial interface IP address

Question 13

This is where the details of the neighboring routers can be found.

Answer 13

adjacency database

Question 14

This is the algorithm used by OSPF.

Answer 14

Short path first

Question 15

All the routers are in the backbone area.

Answer 15

Single-area OSPF

Question 16

This is where you can find the topology table.

Answer 16

link-state database

Question 17

Which three [3] statements describe the similarities between OSPFv2 and OSPFv3?

Answer 17

1. They both use the same DR/BDR election process.
2. They both share the concept of multiple areas.
3. They both are link-state protocols.

Question 18

What is a function of OSPF hello packets?

Answer 18

to discover neighbors and build adjacencies between them

Question 19

What is the command to show neighbor ID of 3.3.3.3

Answer 19

show ip ospf neighbor

Question 20

What is the command to show Routing Process “ospf 10″ with ID 1.1.1.1

Answer 20

show running config

Question 21

What is the command to show Routing Protocol is “ospf 10″

Answer 21

show ip protocols

Question 22

What is the command to show BW 1544 Kbit/sec

Answer 22

show interface serial 0/0/0

Question 23

What are the two [2] purposes of an OSPF router ID?

Answer 23

1. to uniquely identify the router within the OSPF domain

2. to facilitate router participation in the election of the designated router

Question 24

Which command will verify that a router that is running OSPFv3 has formed an adjacency with other routers in its OSPF area

Answer 24

show ipv6 ospf neighbor

Question 25

Single area OSPFv3 has been enabled on a router via the ipv6 router ospf 20 command. Which command will enable this OSPFv3 process on an interface of that router?

Answer 25

ipv6 ospf 20 area 0

Question 26

When a network engineer is configuring OSPFv3 on a router, which command would the engineer issue immediately before configuring the router ID?

Answer 26

ipv6 router ospf 10*

Question 27

Which criterion is preferred by the router to choose a router ID?

Answer 27

the router-id rid command

Question 28

Which OPSF packet contains the different types of link-state advertisements?

Answer 28

LSU

Question 29

What does a Cisco router use automatically to create link-local addresses on serial interfaces when OSPFv3 is implemented?

Answer 29

an Ethernet interface MAC address available on the router, the FE80::/10 prefix, and the EUI-64 process*