多选题Which of the following components must be elected before the Spanning Tree Protocol can converge in a switched LAN?（）Adesignated ports.Bduplex operating mode.Cfast mode ports.Droot bridge.Eroot ports.FBDPU priority.
多选题
Which of the following components must be elected before the Spanning Tree Protocol can converge in a switched LAN?（）
A
designated ports.
B
duplex operating mode.
C
fast mode ports.
D
root bridge.
E
root ports.
F
BDPU priority.
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