What are two differences between the RIB and the FIB? (Choose two.)
What are two differences between the RIB and the FIB? (Choose two.)
The primary purpose of the Routing Information Base (RIB) is to store routing prefixes received from various routing protocols, and it is operated by the control plane. The Forwarding Information Base (FIB), on the other hand, is derived from the RIB and is used by the data plane to determine the egress interface for each packet based on the routing information. Therefore, the RIB contains a database of routing prefixes, while the FIB contains the necessary information to forward packets, including egress interfaces. Based on these definitions, the correct differences are that the RIB is a database of routing prefixes and derived from the control plane, and the FIB is derived from the RIB.
Provided answer is correct
Also, the only table that has the egress interface is RIB and Adjacency Table. Not sure if you can term "FIB - a database of routing prefixes". IMO, it can be since, it does contain all the prefixes/length. If that's the case, i would pick A and D as the correct answer.
C-D are correct
C & D Router# show ip cef adjacency GigabitEthernet 3/0 172.20.26.29 Prefix Next Hop Interface 10.1.1.0/24 10.20.26.29 GigabitEthernet3/0 the interface is there in the adjacency table which is part of FIB and CEF
C & D are correct
RIB is routing prefixes while FIB is from RIB therefore, C and D are the answers
C+D are the answers.
C + D are correct
C and D are correct
Provided answer is correct. Both the RIB and FIB contain network prefixes with egress interface listed. If you execute an “show ip cef” command to display the contents of the CEF table (FIB), you will see the CEF entries listing the egress interface. Additionally, if CEF is enabled, the FIB is used to make forwarding decisions – RIB table is not referenced at all to determine the egress interface.
D is correct but, A and C both could be the answer, RIB operates at the control plane and FIB operates at the data plane, when FIB is enabled it takes a copy from the RIB. based on that I'm leaning toward C.
C and D are correct
C-D are correct
D is correct but there is a doubt re: C. Since, FIB doesn't have the information to choose the egress interface for each packet. Just the prefix/length and next-hop
The egress interface is chosen by the RIB. Could it be A and D?
It has the Prefix, Next Hop and the interface...