Suggested Answer:BD🗳️
The reported distance (or advertised distance) is the cost from the neighbor to the destination. It is calculated from the router advertising the route to the network. For example in the topology below, suppose router A & B are exchanging their routing tables for the first time. Router B says ג€Hey, the best metric (cost) from me to IOWA is 50 and the metric from you to IOWA is 90ג€ and advertises it to router A. Router A considers the first metric (50) as the Advertised distance. The second metric (90), which is from NEVADA to IOWA (through IDAHO), is called the Feasible distance. The reported distance is calculated in the same way of calculating the metric. By default (K1 = 1, K2 = 0, K3 = 1, K4 = 0, K5 = 0), the metric is calculated as follows: Feasible successor is the backup route. To be a feasible successor, the route must have an Advertised distance (AD) less than the Feasible distance (FD) of the current successor route. Feasible distance (FD): The sum of the AD plus the cost between the local router and the next-hop router. The router must calculate the FD of all paths to choose the best path to put into the routing table. Note: Although the new CCNA exam does not have EIGRP topic but you should learn the basic knowledge of this routing protocol.
It's not part of CCNA 200-301 or it shouldn't be. Cisco CCNA courses on Netacad don't even talk about EIGRP and then they would ask you questions about it? If so, that's a total scam and they want you to fail just to make more money.
Read more about the operation of EIGRP and how it selects routes. Yes it uses bandwidth and delay but that's only the default parameters that it uses for the calculation.
Not A because advertised distance is not a report of the bandwidth on the link. Sure it uses bandwidth and delay to calculate a metric but don't confuse the metric with the bandwidth they are not interchangeable.
The Advertised Distance (AD) is the distance from a given neighbor to the destination router.
https://www.pluralsight.com/blog/it-ops/eigrp-overview
https://networklessons.com/eigrp/introduction-to-eigrp#:~:text=You%20have%20now%20learned%20two,to%20get%20to%20the%20destination.
Network topology updates are sent using eigrp, therefore the answer is C, because there was a circuit update by the engineer that has lower AD than the previous route from int0/0.
Yeah you should definitely learn this as well as the AD of other routing protocols.
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