[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.

[单选题]如果把路由器的某个端口的IP配置为：192.168.10.64，掩码配置为：255.255.255.248，则该端口（）

正确答案 ：B

会变成“administratively down”状态

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