Why do large OSPF networks use a hierarchical design? (Choose three.)

Refer to the exhibit.

When running OSPF, what would cause router A not to form an adjacency with router B?

A router has learned three possible routes that could be used to reach a destination network.
One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF
with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the
router install in the routing table?

Refer to the graphic.

R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for
this problem? (Choose two.)

Which command is used to display the collection of OSPF link states?

Refer to the exhibit.

A network associate has configured OSPF with the command:
City(config-router)# network 192.168.12.64 0.0.0.63 area 0
After completing the configuration, the associate discovers that not all the interfaces are
participating in OSPF. Which three of the interfaces shown in the exhibit will participate in OSPF
according to this configuration statement? (Choose three.)

Which statements describe the routing protocol OSPF? (Choose three.)

What is the default administrative distance of OSPF?

Refer to the exhibit.

Given the output for this command, if the router ID has not been manually set, what router ID
will OSPF use for this router?

Which two statements describe the process identifier that is used in the command to configure
OSPF on a router? (Choose two.)
Router(config)# router ospf 1