How are root ports selected?
- All ports on the root bridge become root ports.
- The non-root switches find the port with the shortest path to the root bridge.
- The port with the lowest interface number on each non-root switch becomes the root port.
- The port with the lowest BID on each non-root switch becomes the root port.
Explanation: Non-root switches calculate the path cost to the root bridge by comparing the BPDU information received from neighboring switches. They use the cumulative path cost, which is based on the speed of the link, to select the port with the lowest path cost as its root port. The root port offers the shortest path to the root bridge.
Related exam: 17.3.2 Module Quiz Answers - CCNA 200-301 Exam v1.1 Supplemental Module
