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Exam 350-401 topic 1 question 533 discussion

Actual exam question from Cisco's 350-401
Question #: 533
Topic #: 1
[All 350-401 Questions]

How do the RIB and the FIB differ?

  • A. RIB is derived from the control plane, and the FIB is derived from the RIB.
  • B. FIB is derived from the control plane, and the RIB is derived from the data plane.
  • C. RIB contains the interface for a destination, and the FIB contains the next hop information.
  • D. FIB contains routes learned through a dynamic routing protocol and the RIB contains routes that are static or directly connected.
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by Rose66 at Jan. 15, 2023, 2:30 p.m.

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[Removed]
6 days, 21 hours ago
Selected Answer: A
A is correct
upvoted 1 times
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[Removed]
2 weeks, 4 days ago
I think both A and C are correct
upvoted 1 times
[Removed]
6 days, 21 hours ago
however, A makes more sinse
upvoted 1 times
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Leon7942
1 year ago
why not C? Answer A is correct definitely, but is Answer C also correct as well?
upvoted 2 times
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Rose66
1 year, 5 months ago
Selected Answer: A
RIB is derived from the control plane, it is not used for forwarding. Every protocol such as OSPF, EIGRP, BGP has its own RIB and select their best candidates to try to install to global RIB so that it can then be selected for forwarding. If this is implemented through totally separate RIBs or one big RIB with partitions I am not aware of. FIB is used for forwarding, like Erick explained the information is derived from the RIB and from adjacency tables so that the packet can be rewritten with the correct encapsulation. see https://learningnetwork.cisco.com/s/question/0D53i00000KssjfCAB/routing-rib-vs-fib
upvoted 4 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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