What is the difference between a RIB and a FIB?
What is the difference between a RIB and a FIB?
The difference between a RIB and a FIB lies in their functions and the type of information they handle. The Routing Information Base (RIB) is essentially the routing table where all routing information, including multiple possible routes and routing metrics, is stored. On the other hand, the Forwarding Information Base (FIB) is a more streamlined structure used by the router to make actual packet forwarding decisions. The FIB is populated based on the information contained in the RIB, selecting the best routes decided by the routing algorithms. Thus, the FIB is derived from the RIB, and this forms the core distinction between the two.
The answer is A. https://tools.ietf.org/id/draft-ietf-i2rs-rib-info-model-17.html "Traditionally routers run routing protocols and the routing protocols (along with static configuration information) populate the Routing Information Base (RIB) of the router. The RIB is managed by the RIB manager and the RIB manager provides a northbound interface to its clients, i.e., the routing protocols, to insert routes into the RIB. The RIB manager consults the RIB and decides how to program the Forwarding Information Base (FIB) of the hardware by interfacing with the FIB manager."
Passed the Encor yesterday! had 94 questions and was expecting three labs: 1st was etherchannel configuration, with some stp configs (basic) 2nd was etherchannel config troubleshooting (also basic) 3rd was HSRP configs (pretty straightforward) now after this i was very relaxed like lab's are all done, just 35 more multiple choice and its done cos i had a feeling it was going well. 20 questions left, the screen blanks out again for lab abd im screaming in my head like WTF!!??# 4th was an archive log config, second part was literally "what command do you need on int Gi0/1 to activate the ip flow-top-talkers already configured on the switch/router?" guessing they are testing the archive log labs and prolly some others because the 4th lab felt kinda experimental i dunno. Archive log is not in the lab manual so a bit confused when i saw a post about that here. I mean i read on it just in case and look what happened SMH cisco goddamn!
Thank you nana_amp! What number are the lab questions in this site please? All I see are multiple choice questions.
Passed today. 90 percent of the questions were from here. Got 3 labs: - Etherchannel config + Vlan 10 native on portchannel. - Configure archive log https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/config-mgmt/configuration/15-sy/config-mgmt-15-sy-book/cm-config-logger.html - Configure GLBP Goodluck all!
In case you wonder. Questions are still valid,, I passed the exam 2 days ago. Remember that you'll have: - 98 questions - 3 study cases (in my case they were OSPF and EEM related). I got like 10 new questions though. Good luck in your careers Engineers. Keep it up
I had my exam today, I got 89 questions and 5 labs. Sadly I studied only questions from 600 to 988 and it wasnt enough. The whole pool of 988 questions are used (unlike other exams) I was also the least confident about labs and I got 5 of them...(2 new labs) and around 10 new questions. Better luck next time
Merci pour ton retour!! thank you for your feedback, hoping you will succeed the next time . Please excuse my english.
A is correct
A is correct
did anyone passed exam recently? are those questions valid? what about questions from new ccnp encore version 1.1?
Answer: A B - RIB is the routing table, it contains way more information than FIB. FIB is one of the two tables that CEF uses, it is built based on information found in RIB, but has fewer info. C - FIB contains IP source and prefixes information, not RIB. D - RIB is where all the IP routing information is stored, FIB is where only part of that information is summarized/stored.
the answer is A
A is rite answer
"A" & nothing more
Hi. I have learned ENCOR from Udemy courses, can I pass the exam if I finish and memorize all these 800 dump questions? If you see this, please come back to tell me. 02,Nov.,2023
The problem with this question and these answers is that the question is asking what is the DIFFERENCE between the FIB and RIB. C and D kind of answer that but not exactly.
The Answer is A
A is correct. The Forwarding Information Base (FIB) table - CEF uses a 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 these 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 switching paths such as fast switching and optimum switching. 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 append Layer 2 addressing information. The adjacency table maintains Layer 2 next-hop addresses for all FIB entries. Source: https://www.cisco.com/c/en/us/support/docs/routers/12000-series-routers/47321-ciscoef.html
A is correct