Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 82

Which feature eliminates the need for Cisco Express Forwarding to maintain a route cache?

Answer options

• A. MAC address table
• B. RIB
• C. adjacency table
• D. FIB

Correct answer: D

Explanation

The FIB (Forwarding Information Base) is a data structure that allows for fast packet forwarding, thereby removing the need for Cisco Express Forwarding to maintain a route cache. The other options, like the MAC address table and RIB (Routing Information Base), serve different purposes related to layer 2 and layer 3 routing, respectively, and do not provide the same functionality as the FIB.