During RSTP operation, what happens to ports that receive a superior BPDU?

In Rapid Spanning Tree Protocol (RSTP), when a switch receives a Bridge Protocol Data Unit (BPDU) that is considered superior, it indicates that there is a better spanning tree topology available than what it currently has. This "superior" BPDU typically comes from a switch with a lower Bridge ID or a more recent BPDU, suggesting that this other switch should be the root bridge or that it has better information about the network topology.

When a switch receives this superior BPDU, it recognizes that it is no longer in the best position to forward traffic in the network topology. As a result, the port that received the superior BPDU enters a blocking state. This action helps prevent potential loops in the network and allows the switch to stop forwarding traffic until it can determine how to safely integrate into the new topology being suggested by the superior BPDU. Transitioning to a blocking state is critical in maintaining a loop-free environment and ensuring proper data flow through the network, as it gives the switch time to re-evaluate and potentially change its own role in the spanning tree.

This is why the correct response reflects the procedure followed in RSTP when superior BPDUs are received.