What criteria is used first during the root port selection process?

This item is the same STP concept as the previous one: root port selection begins with the lowest total path cost to the root bridge. A switch evaluates each possible path toward the root and selects the port that gives the lowest cumulative STP cost. If multiple ports tie on cost, the switch then applies the STP tie-breakers in order. It compares the lowest neighbor bridge ID, then the lowest neighbor port ID, and finally the lowest local port ID if needed. The exam often repeats this rule because engineers must troubleshoot blocked links by understanding exactly why a port was selected. Cisco CCNA 200-301 v1.1 Network Access includes spanning-tree operation, root bridge behavior, and root port selection. The first criterion is not local port ID or neighbor information. Those are secondary tie-breakers. The correct first criterion is the lowest path cost to the root bridge.