多项选择题
A.RSTP cannot operate with PVST+.
B.RSTP defines new port roles.
C.RSTP defines no new port states.
D.RSTP is a proprietary implementation of IEEE 802.1D STP.
E.RSTP is compatible with the original IEEE 802.1D STP.
多项选择题 What are the possible trunking modes for a switch port? （）
单项选择题 Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state?（）
单项选择题 Refer to the exhibit. At the end of an RSTP election process, which access layer switch port will assume the discarding role?（）