CCNP Route FAQ: OSPF Overview and Neighbor Relationships Figure: Typical Hierarchical OSPF Design Q1. A router has been configured with the commands router ospf 9, network 172.16.1.0 0.0.0.255 area 8, and network 172.16.0.0 0.0.255.255 area 9, in that order. No other OSPF-related commands have been configured. The answers list the IP addresses that could be assigned to this … [Read more...]