Under which two circumstances would an RSTP bridge flush its CAM table?()
- A、upon a port state change
- B、upon receiving a topology change notification
- C、when transitioning from discarding to forwarding
- D、when transitioning from forwarding to discarding
- E、only when changing from listening to discarding
- F、when CAM resources have been completely used up
正确答案:B,C
答案解析:有
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