In this weekly series, Jill Liles posts questions and answers to help readers prepare for the CCNA exam.

You observe the following in the output of the

show ip route

command on Router A:

O IA 172.16.1.0 [110/90] via 10.1.1.1, 0:02:15, FastEthernet0/0

Which statement is true?

1. 172.16.1.0 is in the same OSPF area as Router A. The cost to it is 90 and it is reachable through neighbor 10.1.1.1 on Router A’s interface Fa0/0.
2. 172.16.1.0 is in a different OSPF area than Router A. The cost to it is 90 and it is reachable through neighbor 10.1.1.1 on Router A’s interface Fa0/0.
3. 172.16.1.0 is in the same OSPF area as Router A. The cost to it is 110 and it is reachable through neighbor 10.1.1.1 on Router B’s interface Fa0/0.
4. 172.16.1.0 is in a different OSPF area than Router A. The cost to it is 110 and it is reachable through neighbor 10.1.1.1 on Router B’s interface Fa0/0.
5. 172.16.1.0 is in a different OSPF area than Router A. The cost to it is 110 and it is reachable through neighbor 10.1.1.1 on Router A’s interface Fa0/0.

The correct answer is B.

172.16.1.0 is in a different OSPF area than Router A, as indicated by the O IA (for OSPF inter-area). The administrative distance is 110 and the cost to the route is 90, as indicated by [110/90]. The route is reachable through neighbor 10.1.1.1 on Router A’s interface Fa0/0.

Related Courses:
ICND1 — Interconnecting Cisco Network Devices 1
ICND2 — Interconnecting Cisco Network Devices 2
CCNAX — CCNA Boot Camp v1.1