CCNA 2 CHAPTER 8 STUDYGUIDE
Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration? 0.0.0.32 0.0.0.31 255.255.255.223 255.255.255.224
0.0.0.31*
What message is displayed on www.ciscoville.com?
Completion!*
By order of precedence, match the selection of router ID for an OSFP-enabled router to the possible router ID options. (Not all options are used.) First Precedence
Configured router 1.1.1.1
Match the OSPF state with the order is occurs: First State
Down state
Match the OSPF state with the order is occurs: Fifth State
Exchange State
Match the OSPF state with the order is occurs: Fourth State
Exstart state
Which three addresses could be used as the destination address for OSPFv3 messages? (Choose three.) FF02::5 FF02::1:2 FE80::1 FF02::6 FF02::A 2001:db8:cafe::1
FF02::5 *** FE80::1 *** FF02::6 ***
Match the OSPF state with the order is occurs: Seventh State
Full State
What is the first criterion used by OSPF routers to elect a DR? Highest priority Highest IP address Highest MAC address Highest router ID
Highest priority*
Match the OSPF state with the order is occurs: Second State
Init State
Which OPSF packet contains the different types of link-state advertisements? LSR LSU DBD LSAck hello
LSU*
Match the OSPF state with the order is occurs: Sixth State
Loading State
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? SPF will run and determine which neighbor router is "down". OSPF will run a new DR/BDR election. OSPF will remove that neighbor from the router link-state database. A new dead interval timer of 4 times the hello interval will start.
OSPF will remove that neighbor from the router link-state database.*
A router is participating in an OSPFv2 domain. What will always happen if the dead interval expires before the router receives a hello packet from an adjacent DROTHER OSPF router? OSPF will run a new DR/BDR election. SPF will run and determine which neighbor router is "down". A new dead interval timer of 4 times the hello interval will start. OSPF will remove that neighbor from the router link-state database.*
OSPF will remove that neighbor from the router link-state database.*
Refer to the exhibit. A network administrator issued the command show ip ospf interface on the router R2. What conclusion can be drawn? R2 has not formed an adjacency with any other router R2 is connecting to a point-to-point network R2 is configured with the OSPF router-id command R2 is not configured with default Hello and Dead timer values
R2 has not formed an adjacency with any other router ***
By order of precedence, match the selection of router ID for an OSFP-enabled router to the possible router ID options. (Not all options are used.) Fourth Precedence
Serial interface address 192.168.10.1
This is the algorithm used by OSPF
Shortest Path First
Match the information to the command that is used to obtain the information BW 1544 Kbit/sec
Show interface serial 0/0/0
All the routers are in the backbone area
Single-area OSPF
A network administrator enters the command ipv6 router ospf 64 in global configuration mode. What is the result of this command? The OSPFv3 process will be assigned an ID of 64.* The router will be assigned a router ID of 64. The router will be assigned an autonomous system number of 64. The reference bandwidth will be set to 64 Mb/s.
The OSPFv3 process will be assigned an ID of 64.*
Which three statements describe the similarities between OSPFv2 and OSPFv3? They both have unicast routing enabled by default. They both use the exit interface address as the source address when sending OSPF messages. They both use the same DR/BDR election process. They both support IPsec for authentication. They both share the concept of multiple areas. They both are link-state protocols.
They both use the same DR/BDR election process.* They both share the concept of multiple areas.* They both are link-state protocols.*
Match the OSPF state with the order is occurs: Third State
Two-way state
Which three statements describe features of the OSPF topology table? (Choose three.) When converged, all routers in an area have identical topology tables. Its contents are the result of running the SPF algorithm. After convergence, the table only contains the lowest cost route entries for all known networks. It is a link-state database that represents the network topology. The topology table contains feasible successor routes. The table can be viewed via the show ip ospf database command.
When converged, all routers in an area have identical topology tables.* It is a link-state database that represents the network topology.* The topology table contains feasible successor routes. The table can be viewed via the show ip ospf database command.*
This is where the details of the neighboring routers can be found.
adjacency database
What is used to create the OSPF neighbor table? adjacency database routing rable link-state database forwarding database
adjacency database
What does a Cisco router use automatically to create link-local addresses on serial interfaces when OSPFv3 is implemented? an Ethernet interface MAC address available on the router, the FE80::/10 prefix, and the EUI-64 process* the MAC address of the serial interface, the FE80::/10 prefix, and the EUI-64 process the FE80::/10 prefix and the EUI-48 process the highest MAC address available on the router, the FE80::/10 prefix, and the EUI-48 process
an Ethernet interface MAC address available on the router, the FE80::/10 prefix, and the EUI-64 process*
Which OSPFv3 function works differently from OSPFv2? OSPF packet types election process hello mechanism metric authentication authentication
authentication*
Which OSPFv3 function works differently from OSPFv2? authentication metric calculation hello mechanism election process OSPF packet types
authentication*
Fill in the blank. OSPF uses ________________ as a metric.
cost
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? ipv6 ospf 20 area 0* ipv6 ospf 20 area 20 ipv6 ospf 0 area 20 ipv6 ospf 0 area 0
ipv6 ospf 20 area 0*
When a network engineer is configuring OSPFv3 on a router, which command would the engineer issue immediately before configuring the router ID? ipv6 router ospf 10 ipv6 ospf 10 area 0 interface serial 0/0/1 clear ipv6 ospf process
ipv6 router ospf 10*
This is where you can find the topology table
link-state database
Which OSPF component is identical in all routers in an OSPF area after convergence? routing table link-state database SPF tree adjacency database
link-state database*
By order of precedence, match the selection of router ID for an OSFP-enabled router to the possible router ID options. (Not all options are used.) Second Precedence
loopback interface IP address 172.16.1.1
By order of precedence, match the selection of router ID for an OSFP-enabled router to the possible router ID options. (Not all options are used.) Third Precedence
loopback interface address 10.1.1.1
What are two reasons that will prevent two routers from forming an OSPFv2 adjacency? (Choose two.) a mismatched Cisco IOS version that is used mismatched OSPF Hello or Dead timers mismatched subnet masks on the link interfaces use of private IP addresses on the link interfaces one router connecting to a FastEthernet port on the switch and the other connecting to a GigabitEthernet port
mismatched OSPF Hello or Dead timers* mismatched subnet masks on the link interfaces*
What are two reasons that will prevent routers from forming an OSPFv2 adjacency? (Choose two.) mismatched subnet masks on the link interfaces use of private IP addresses on the link interfaces one router connecting to a FastEthernet port on the switch and the other connecting to a GigabitEthernet port a mismatched Cisco IOS version that is used mismatched OSPF Hello or Dead timers
mismatched subnet masks on the link interfaces *** mismatched OSPF Hello or Dead timers ***
Fill in the blank. The election of a DR and a BDR takes place on _______________________ networks, such as Ethernet networks.
multiaccess
Match the information to the command that is used to obtain the information Routing Process ospf 10 with ID 1.1.1.1
show ip ospf
Match the information to the command that is used to obtain the information Neighbor ID of 3.3.3.3
show ip ospf neighbor
What command would be issued to determine if a routing protocol-initiated relationship has been made with an adjacent router? show ip protocols ping show ip interface brief show ip ospf neighbor
show ip ospf neighbor ***
What command would be used to determine if a routing protocol-initiated relationship had been made with an adjacent router? show ip protocols ping show ip ospf neighbor show ip interface brief
show ip ospf neighbor*
Match the information to the command that is used to obtain the information Routing Protocol is ospf 10
show ip protocols
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? show ip protocols show ip ospf interface show ip ospf show ip ospf neighbor
show ip protocols*
Which command will verify that a router that is running OSPFv3 has formed an adjacency with other routers in its OSPF area? show ipv6 ospf neighbor show ipv6 route ospf show ipv6 interface brief show running-configuration
show ipv6 ospf neighbor*
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 ________________________________
show ipv6 protocols
Which command will provide information specific to OSPFv3 routes in the routing table? show ip route ospf show ip route show ipv6 route ospf show ipv6 route
show ipv6 route ospf*
Which criterion is preferred by the router to choose a router ID? the IP address of the highest configured loopback interface on the router the router-id rid command the IP address of the highest active OSPF-enabled interface the IP address of the highest active interface on the router
the router-id rid command*
What is a function of OSPF hello packets? to send specifically requested link-state records to discover neighbors and build adjacencies between them to request specific link-state records from neighbor routers to ensure database synchronization between routers
to discover neighbors and build adjacencies between them*
What are the two purposes of an OSPF router ID? (Choose two.) to uniquely identify the router within the OSPF domain to enable the SPF algorithm to determine the lowest cost path to remote networks to facilitate the transition of the OSPF neighbor state to Full to facilitate router participation in the election of the designated router to facilitate the establishment of network convergence
to uniquely identify the router within the OSPF domain* to facilitate router participation in the election of the designated router*
