In STP, which statement describes the root port?

In STP, which statement describes the root port?

• A. It is the port on a non-root switch that provides the best path toward the root bridge.
• B. It is the port designated for the local LAN segment.
• C. It is always in a forwarding state.
• D. It is the port on the root switch that connects to the backbone.

Answer: (A)

In Spanning Tree Protocol, a root bridge is the reference point for all path calculations. Each non-root switch assigns one port as the root port—the port that provides the best path to the root bridge. This is the single path the switch uses to forward traffic toward the root, with the decision based on the lowest path cost (and tie-breakers like neighbor ID and port ID if needed). The root bridge itself has no root port because it serves as the destination for all paths. The remaining ports on the switch become designated ports for their connected segments or are blocked to prevent loops, guiding traffic efficiently through the network while avoiding cycles.

In Spanning Tree Protocol, a root bridge is the reference point for all path calculations. Each non-root switch assigns one port as the root port—the port that provides the best path to the root bridge. This is the single path the switch uses to forward traffic toward the root, with the decision based on the lowest path cost (and tie-breakers like neighbor ID and port ID if needed). The root bridge itself has no root port because it serves as the destination for all paths. The remaining ports on the switch become designated ports for their connected segments or are blocked to prevent loops, guiding traffic efficiently through the network while avoiding cycles.