What is the correct description of EIGRP K-value K2?

EIGRP (Enhanced Interior Gateway Routing Protocol) uses K-values as metrics to determine the best path for routing. In this context, K2 represents the reliability of the link. In EIGRP's metric calculation, K2 is set to 0 by default, which indicates that reliability is not factored into the overall metric computation unless explicitly configured otherwise.

When K2 is set to 0, it essentially means that the reliability metric does not contribute to the route selection process; EIGRP will primarily rely on other factors such as bandwidth, delay, load, and MTU as defined by K1, K3, K4, and K5 respectively. This setting is significant because it allows network administrators to simplify the routing metric calculations and focus on the most impactful parameters for their specific network environment.

K-values can be adjusted in EIGRP, but understanding that the default setting for K2 is 0 helps clarify why reliability does not play a role in calculating the route metric unless the administrator decides to include it.