数据通信网的拥塞问题指的是()-查字典考试网

数据通信网的拥塞问题指的是()

A、数据速率太快导致传输差错和误码
B、分组到达和排队的速率超过交换节点分组的传输速率
C、发送端数据发送的速率太快，超过了接收端的处理速率
D、网络拓扑发生变化时，后续分组不能绕开故障区域

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