Which path attribute is used by a link-state routing protocol to choose the best path when there are multiple paths to a destination network?

In link-state routing protocols, the primary path attribute used to choose the best path to a destination network is the cost or metric associated with each path. This cost is typically based on factors like bandwidth, delay, or other criteria defined by the network administrator. The protocol calculates the shortest path using algorithms like Dijkstra's algorithm, selecting the route with the lowest total cost.