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MPLS Fundamentals by Luc De Ghein - CCIE No. 1897

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Chapter 6

1. Name the two components of CEF.
A1: Answer: The two components of CEF are the adjacency table and the FIB or CEF table.
2. Name the three most common packet switching methods in Cisco IOS.
A2: Answer: Process switching, fast switching, and CEF switching are the three most common packet switching methods in Cisco IOS.
3. Why does MPLS use CEF?
A3: Answer: MPLS uses CEF because it is the only switching method in Cisco IOS that implements labeling of incoming IP packets.
4. What is the adjacency table used for?
A4: Answer: The adjacency table takes care of the Layer 2 rewrite of the frames that are switched by the router.
5. What fields of the IP header does CEF use to load-balance IP packets?
A5: Answer: CEF uses the destination ...

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