Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 468

How do the RIB and the FIB differ?

Answer options

• A. RIB is derived from the control plane, and the FIB is derived from the RIB.
• B. FIB is derived from the control plane, and the RIB is derived from the data plane.
• C. RIB contains the interface for a destination, and the FIB contains the next hop information.
• D. FIB contains routes learned through a dynamic routing protocol and the RIB contains routes that are static or directly connected.

Correct answer: A

Explanation

The correct answer is A because the Routing Information Base (RIB) is populated through routing protocols in the control plane, while the Forwarding Information Base (FIB) is derived from the RIB to enable packet forwarding. Options B, C, and D are incorrect as they misrepresent the relationship and roles of RIB and FIB in the routing process.