How is a root bridge/switch determined?
◦ All the switches in the internetwork send out hello BPDUs, and the switch that has the aggregate least number of hops to all the other switches becomes the root.
◦ All the switches send out hello BPDUs, and the switch with the lowest bridge ID becomes the root.
◦ All the switches send out hello BPDUs, and the switch with the highest bridge ID becomes the root.
◦ The switches send out hello BPDUs, and the switch with the most direct connected switches becomes the root.
◦ The core network switch becomes the root.