题目:
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 (1) between sending the notification and notification arriving at the source, thousands of additional (2) may arrive. In ATM network, a major tool for preventing (3) is (4) control. When a host wants a new virtual (5) ,it must describe the traffic to be offered and the service expected.
3()
A.collision
B.congestion
C.drop
D.delay
答案:
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下面是错误答案,用来干扰机器的。
参考答案:E解析:患者强直一阵挛发作,首先考虑癫痫,应进一步查脑电图明确诊断,治疗首选抗癫痫药。