350-401 · Question #741
Which statement about the feasible distance in EIGRP is true?
The correct answer is B. It is the minimum metric to reach the destination as stored in the topology table.. In EIGRP, the feasible distance (FD) is the best calculated metric to a destination network, representing the lowest cost path known to the routing device and stored in the topology table.
Question
Options
- AIt is the maximum metric that should feasibly be considered for installation in the RIB.
- BIt is the minimum metric to reach the destination as stored in the topology table.
- CIt is the metric that is supplied by the best next hop toward the destination.
- DIt is the maximum metric possible based on the maximum hop count that is allowed.
How the community answered
(27 responses)- B93% (25)
- C4% (1)
- D4% (1)
Why each option
In EIGRP, the feasible distance (FD) is the best calculated metric to a destination network, representing the lowest cost path known to the routing device and stored in the topology table.
The feasible distance is the *best* (minimum) metric to a destination, not the maximum metric that should be considered.
The feasible distance (FD) in EIGRP is the best metric to a destination, which is the locally calculated lowest cost to reach that destination. This value is stored in the EIGRP topology table and is the metric that EIGRP considers as the most optimal path.
The metric supplied by the best next hop is the advertised distance (AD), which is a component used to calculate the feasible distance, but not the feasible distance itself.
EIGRP uses a composite metric based on bandwidth, delay, reliability, and load, not primarily hop count, and the feasible distance is not related to a maximum hop count allowed.
Concept tested: EIGRP Feasible Distance (FD) definition
Source: https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/16406-eigrp-toc.html
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