多选题Which two of these statements regarding RSTP are correct？（）ARSTP cannot operate with PVST+.BRSTP defines new port roles.CRSTP defines no new port states.DRSTP is a proprietary implementation of IEEE 802.1D STP.ERSTP is compatible with the original IEEE 802.1D STP.
多选题
Which two of these statements regarding RSTP are correct？（）
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.
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