软件水平考试

【单选题】In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (71) between sending the notification and notification arriving at the source, thousands of additional (72) may arrive. InATM network , a major tool for pre- venting (73) is (74) control. When a host wants a new virtual (75) , it must describe the traffic to be offered and the service expecteD、
A．interval
B．time
C．slot
D．delay

网考网参考答案：A
网考网解析：
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