Which two switch states are valid for 802.1w? (Choose two.)

Which two switch states are valid for 802.1w? (Choose two.)
A . listening
B . backup
C . disabled
D . learning
E . discarding

Answer: D, E

Explanation:

Port States

There are only three port states left in RSTP 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.