Which of the following commands can be used to check OSPF routes in the global...

To check OSPF-learned routes in the global IP routing table, the correct command is display ip routing-table protocol ospf, so option A is correct. This command filters the routing table and shows only the routes whose source protocol is OSPF. It is especially useful when verifying whether OSPF-learned routes have been successfully installed into the forwarding table after neighbor establishment and LSDB calculation.

Option B, display ospf peer, is used to check OSPF neighbor information and adjacency states, not the routing table. Option C, display ospf interface, shows OSPF-related parameters on interfaces such as timers, network type, and cost. Option D, display ospf routing, displays OSPF route information maintained by the OSPF process itself, but the question specifically asks about routes in the global routing table, which is the RIB used for actual forwarding decisions. HCIA-Datacom distinguishes between protocol-specific route information and the final routing table seen by the device. Understanding this distinction helps engineers verify whether a protocol has only learned topology information or has actually produced usable forwarding entries.