Question 260
A Cisco routing table contains `O IA 10.70.0.0/16 [110/40] via 192.0.2.5`. What does the `O IA` route code indicate?
Explanation
Correct Answer
Cisco IOS route codes identify the origin and kind of an installed route. O identifies OSPF, while IA indicates an inter-area route rather than an intra-area O entry. The distance/metric brackets still describe route preference and OSPF cost separately from that category marker.
Incorrect Answers
EIGRP routes normally use the D origin code. The OSPF IA suffix specifically distinguishes inter-area information in the OSPF route display.
The line contains an IPv4 prefix and OSPF route attributes. Interface IPv6 addressing uses a different family of commands and outputs.
Dynamic routing entries can also display next hops. The protocol code, not merely the presence of a via address, identifies the route source.