参考答案:ABC
帧中继网的虚电路建立在 (1) ,在用户层面采用的协议是 (2) 。这种网络没有流量控制功能,但增加了拥塞控制功能。如果沿着帧传送方向出现了拥塞,则把帧地址字段中的 (3) 位设置为1,这样接收方就可通过 (4) 协议要求发送方降低数据速率。最适合提供帧中继业务的网络是 (5) 。
5()
帧中继(Frame Relay,FR)是从分组交换技术发展起来的,它采用虚电路技术,对分组交换技术进行简化,具有吞吐量大、时延小,适合突发性业务等特点,能充分利用网络资源。
第36题: [简答题]1. Nowadays more and more people are concerned about their health.
2. Medical researchers have proven that what people eat affects their health.
3. Getting rid of bad habits like smoking and drinking alcohol is also an important way to keep healthy.
参考答案:
答案解析:How to Keep Healthy
Nowadays more and more people are concerned about their health. If you happen
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