RSTP中处于Discarding状态下的端口，虽然会对接收到的数据帧做丢弃处理。但可以根据该端口收到的数据帧维护MAC地址表（）

A.Discarding

B.Forwarding

C.Listening

D.Learning

A.Listening

B.Learning

C.Discarding

D.Forwarding

A.Disabled

B.Blocking

C.Discarding

D.Listening

E.Learning

F.Forwarding

A.Blocking

B.Forwarding

C.Discarding

D.Learning

A.Forwarding

B.Listening

C.Learning

D.Discarding

A.Listening;

B.backup;

C.Learning;

D.alternate

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 atates 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.

A.Disabled

B.Blocking

C.Listening

D.Learning

E.Forwarding