Exam RCNI topic 1 question 5 discussion

Root Bridge Behavior: All ports on the root bridge that are part of the active topology (i.e., not redundant) are designated ports and always forwarding. Non-Root Switch Behavior: Chooses one Root Port — its best path to the root. If there are multiple equal-cost links, it uses the Bridge ID and Port ID in the BPDU sent by the root to choose: Lower Root Bridge ID → tie (same bridge) Lower Root Port ID → this is the deciding factor The Root Port ID = Port Priority + Port Number on the root bridge So it picks the link where the BPDU came from the lowest port number on the root bridge.