CCIE Routing and Switching (legacy) — Question 2

Which two statements about Cisco Express Forwarding are true? (Choose two.)

Answer options

• A. Layer 2 next-hop address information is maintained in the FIB table.
• B. The FIB table resides on the route processor and the adjacency table resides on the line cards when Cisco Express Forwarding is enabled.
• C. The FIB table and the adjacency table reside on the line cards when Cisco Express Forwarding is enabled.
• D. Layer 2 next-hop address information is maintained in the adjacency table.

Correct answer: B, D

Explanation

Option B is correct because it accurately describes the locations of the FIB and adjacency tables when Cisco Express Forwarding is active. Option D is also correct as it rightly states that Layer 2 next-hop address information is stored in the adjacency table. Options A and C are incorrect; A mistakenly places Layer 2 information in the FIB table, while C incorrectly suggests both tables are housed on the line cards.