CCNA 2 Chapter 8
Terms in this set (32)
Which OSPF component is identical in all routers in an OSPF area after convergence?
Which three statements describe features of the OSPF topology table?
It is a link-state database that represents the network topology.
When converged, all routers in an area have identical topology tables.
The table can be viewed via the show ip ospf database command.
What is a function of OSPF hello packets?
to discover neighbors and build adjacencies between them
Which OPSF packet contains the different types of link-state advertisements?
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?
OSPF will remove that neighbor from the router link-state database.
What are the two purposes of an OSPF router ID?
to uniquely identify the router within the OSPF domain
to facilitate router participation in the election of the designated router
Which criterion is preferred by the router to choose a router ID?
the router-id rid command
Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?
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
Which OSPFv3 function works differently from OSPFv2?
Which three statements describe the similarities between OSPFv2 and OSPFv3?
They both are link-state protocols.
They both share the concept of multiple areas.
They both use the same DR/BDR election process.
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
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.
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
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
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
Which command will provide information specific to OSPFv3 routes in the routing table?
show ipv6 route ospf
The election of a DR and a BDR takes place on _____ networks, such as Ethernet networks. There is no need to have a DR/BDR election on a point to point link.
The OSPF metric is ____. The lowest cost path to a remote destination is the preferred path and is installed in the routing table.
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
BW 1544 Kbit/sec
show interface serial 0/0/0
Routing Protocol is "ospf 10"
show ip protocols
neighbor ID of 220.127.116.11
Show ip ospf neighbor
Routing process "ospf 10" with ID 18.104.22.168
show ip ospf
Configured router ID 22.214.171.124
loopback interface IP address 172.16.1.1
Loopback interface address 10.1.1.1
Serial Interface IP address 192.168.10.1
This is the algorithm used by OSPF
Shortest path first
This is where the details of the neighboring routers can be found.
This is where you can find the topology table
All routers are in the backbone area
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