How is OSPF configured?

Refer to the exhibit.

The show ip ospf interface command has been executed on R1.

How is OSPF configured?
A . The interface is not participating in OSP
C . A point-to-point network type is configured.
D . The default Hello and Dead timers are in use.
E . There are six OSPF neighbors on this interface.

View Answer

Answer: C

Explanation:

From the output we can see there are Designated Router & Backup Designated Router for this OSPF domain so this is a broadcast network (point-to-point and point-to multipoint networks do not elect DR & BDR) -> Answer B is not correct.

By default, the timers on a broadcast network (Ethernet, point-to-point and point -to- multipoint) are 10 seconds hello and 40 seconds dead (therefore answer C is correct). The timers on a non- broadcast network are 30 seconds hello 120 seconds dead.

From the line “Neighbor Count is 3”, we learn there are four OSPF routers in this OSPF domain -> Answer D is not correct.

Reference: https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13689-17.html