What are the three switch port states of the rapid spanning tree protocol (RSTP)?

What are the three switch port states of the rapid spanning tree protocol (RSTP)?

• Blocking, Learning, Forwarding
• Disabled, Listening, Forwarding
• Discarding, Learning, Forwarding
• Disabled, Blocking, Forwarding 

EXPLANATION

There are 3 port states in RSTP (802.1w) that correspond to the three possible operational states. The 802.1D disabled, blocking, and listening states are merged into a unique 802.1w discarding state. The end result is faster reconvergence time. So the three switch port states are:

• Discarding - No user data is sent over the port
• Learning - The port is not forwarding frames yet, but is populating its MAC-address-table
• Forwarding - The port is fully operational