In Rapid Spanning Tree Protocol, which port mode replaces the blocking and listening port states?

A. Discarding
B. Learning
C. Forwarding
D. Backup

A. RSTP has three port states: discarding, learning, and forwarding. Blocking and listening are both mapped to discarding in RSTP. When a port is in a state of discarding, it means the interface is discarding all frames except for BPDUs.