At which layer does Cisco Express Forwarding use adjacency tables to populate addressing information?

A. Layer 4

B. Layer 3

C. Layer 2

D. Layer 1








 

Suggested Answer: C

Adjacency table - Nodes in the network are said to be adjacent if they can reach each other with a single hop across a link layer. In addition to the
FIB, CEF uses adjacency tables to prepend Layer 2 addressing information. The adjacency table maintains Layer 2 next-hop addresses for all FIB entries.
References:
http://www.cisco.com/c/en/us/support/docs/routers/12000-series-routers/47321-ciscoef.html

This question is in 300-101 Cisco Implementing Cisco IP Routing (ROUTE) Exam
For getting Cisco Certified Network Professional (CCNP) Routing and Switching Certificate




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