[多选题]In which Spanning-Tree states does a switch port learn MAC addresses? (Select two)

正确答案 ：CD

Forwarding

Learning

解析：解析：Explanation:

[多选题]Which of the following are types of flow control? (Choose three)

正确答案 ：ACD

Buffering

Windowing

Congestion avoidance

解析：解析：Explanation:Datatransmissionflowcontroloccursatlayer4withthehelpofbuffering,windowingandcongestionavoidance.

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