CCNA Routing and Switching (legacy) — Question 156

Which feature builds a FIB and an adjacency table to expedite packet forwarding?

Answer options

• A. cut through
• B. fast switching
• C. process switching
• D. Cisco Express Forwarding

Correct answer: D

Explanation

The correct answer is D, Cisco Express Forwarding, as it uses the Forwarding Information Base (FIB) and an adjacency table to improve packet processing efficiency. Options A (cut through), B (fast switching), and C (process switching) do not utilize both a FIB and adjacency table in their packet forwarding methods, making them less efficient in comparison.