A、RSTP significantly reduces topology reconverging time after a link failure.
B、RSTP expends the STP port roles by adding the alternate and backup roles.
C、RSTP port satates are blocking,discarding,learing,or forwarding.
D、RSTP also uses the STP proprsal-agreement sequence.
E、RSTP use the same timer-baseed process as STP on point-to-point links.
F、RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.