ExamGecko
Question list
Search
Search

Related questions











Question 265 - 350-401 discussion

Report
Export

What is the difference between a RIB and a FIB?

A.

The RIB is used to make IP source prefix-based switching decisions

Answers
A.

The RIB is used to make IP source prefix-based switching decisions

B.

The FIB is where all IP routing information is stored

Answers
B.

The FIB is where all IP routing information is stored

C.

The RIB maintains a mirror image of the FIB

Answers
C.

The RIB maintains a mirror image of the FIB

D.

The FIB is populated based on RIB content

Answers
D.

The FIB is populated based on RIB content

Suggested answer: D

Explanation:

CEF uses a Forwarding Information Base (FIB) to make IP destination prefix-based switching decisions. The FIB is conceptually similar to a routing table or information base. It maintains a mirror image of the forwarding information contained in the IP routing table. When routing or topology changes occur in the network, the IP routing table is updated, and those changes are reflected in the FIB. The FIB maintains next-hop address information based on the information in the IP routing table.

Because there is a one-to-one correlation between FIB entries and routing table entries, the FIB contains all known routes and eliminates the need for route cache maintenance that is associated with earlier switching paths such as fast switching and optimum switching.

Note: In order to view the Routing information base (RIB) table, use the "show ip route" command.

To view the Forwarding Information Base (FIB), use the "show ip cef" command. RIB is in Control plane while FIB is in Data plane.

asked 10/10/2024
Jim McKay
34 questions
User
Your answer:
0 comments
Sorted by

Leave a comment first