Exam 350-401 topic 1 question 1 discussion

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 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!

Hello are those questions still relevant and will show in exam

From the book: CCNP and CCIE Enterprise Core ENCOR 350-401 Official Cert Guide Forwarding Information Base: The FIB is built directly from the routing table and contains the next-hop IP address for each destination in the network. It keeps a mirror image of the forwarding information contained in the IP routing table. When a routing or topology change occurs in the network, the IP routing table is updated, and these changes are reflected in the FIB. CEF uses the FIB to make IP destination prefix-based switching decisions.

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

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 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.

A is correct

The Answer is A

A is correct

the answer is A

A is correct

A is correct

The answer is A.

fib is populated with rib information. fib is the forwarding information base and rib is the routing informaition database

The fib is populated with RIB content, fib is used by CEF to perform hardware switching

correct answer is A