Refer to the exhibit. During a synchronization of port roles, a device receives a proposal message on one of its ports that is s selected as the new root port. The logs show that Rapid PVST+ forced al

In Rapid PVST+ (RSTP), when a switch receives a superior BPDU on its root port, indicating a new root bridge, it must re-converge the spanning tree. Any designated port that is not an edge port and is currently in a forwarding state, upon synchronization with this new root information, will immediately transition to the blocking (or discarding) state to prevent temporary loops before eventually converging to its new role and state in the updated topology.

Discarding frames is part of the blocking state, but the primary action for the port is to transition its *state* to blocking, not just discard frames while remaining in forwarding.

A designated port transmits BPDUs; not receiving them for transmission would indicate a different port role or state, which is not the immediate effect of synchronization with new root information on a designated port.

Immediately replying with its own information would lead to a potential loop if the information is stale and the port does not first transition to a blocking state.