In low-speed network,it is usually adequate to wait for congestion to occur and then react to it by telling the source of packet

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问题 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 oRen works poorly,because in the  (71)  between sending the notification and notification arriving at the source,thousands of additional(72)may arrive.In ATM network,a major tool for preventing(73)is(74) control.When a host wants a new virtual(75).it must describe the traffic to be offered and the service  Expected.
(73)

选项 A、collision
B、congestion
C、drop
D、delay

答案B

解析
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