正解:D
The RIB (Routing Information Base) is derived from the control plane, which is responsible for network routing decisions. It contains the routing table with all learned routes, including static, directly connected, and dynamically learned routes. The FIB (Forwarding Information Base), on the other hand, is derived from the RIB and is used in the data plane for making actual packet forwarding decisions. It contains the best routes selected from the RIB and is optimized for fast lookup to efficiently forward packets to their next hop.