If the root bridge fails， configuration BPDUs will no longer be sent. Which STP timer will have toexpire before the other switches can actively restore connectivity with topology change procedureof STP？（）
- A、hello timer
- B、BPDU timer
- C、Forward_delay timer
- D、Max_age timer
- E、Dead timer
- F、Wait timer
正确答案:D
答案解析:有
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