ICND1 OSPF Configuration 3

Question 1

What is the default OSPF dead interval on a broadcast network?

Accepted Answer

40 seconds

Answer

The default dead interval is 40 seconds, which is 4 times the default hello interval of 10 seconds.

Question 2

Which command configures a passive interface in OSPF, preventing hello packets from being sent out that interface?

Accepted Answer

passive-interface GigabitEthernet0/0

Answer

The 'passive-interface' command under the OSPF process stops hellos on that interface while still advertising the connected network.

Question 3

Which OSPF LSA type describes a router's directly connected links within an area?

Accepted Answer

Type 1 (Router LSA)

Answer

Type 1 Router LSAs are generated by every OSPF router and describe that router's links within the area.

Question 4

What is the purpose of the 'area 0' designation in OSPF?

Accepted Answer

It is the backbone area that all other areas must connect to

Answer

Area 0 is the OSPF backbone area, and all other areas must connect to it either directly or via a virtual link.

Question 5

A router running OSPF has a cost of 10 on Fa0/0 and 100 on Fa0/1. Which path will OSPF prefer to reach a remote network?

Accepted Answer

Fa0/0 because OSPF prefers lower cost

Answer

OSPF uses the lowest cumulative cost path, so the interface with cost 10 is preferred over cost 100.

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test