What value is primarily used to determine which port becomes the root port on each non-root switch in a spanning-tree topology? A. path cost B. lowest port MAC address C. VTP revision number D. highest port priority number E. port priority number and MAC address
Correct Answer: A
Explanation:
The path cost to the root bridge is the most important value to determine which port will become the root port on each non-root switch. In particular, the port with lowest cost to the root bridge will become root port (on non-root switch).