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 portatates are blocking,discarding,learing,orforwarding.
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.

A.Because of damaged flash memory, the router will fail the POST.
B.It will attempt to locate the IOS from a TFTP server. If this fails, it will initiate the setup dialog.
C.It will attempt to locate the IOS from a TFTP server. If this fails, it will load a limited IOS from ROM.
D.It will attempt to locate the configuration file from a TFTP server. If this fails, it will initiate the setup dialog.
E.It will attempt to locate the configuration file from a TFTP server. If this fails, it will load a limited configuration from ROM.