现代的全球网络媒体和通信系统起源于19世纪，当时信息第一次以电子方式远距离传送。
Today's globally networked media and communication system has its origins in the 19th century, when, for the first time, messages were sent electronically across great distances.
在常见的长距离网络环境中，带宽大约为1m，延迟时间大约为100毫秒。
In a common long-distance network environment, the bandwidth is about 1m and the latency is about 100 milliseconds.
因为数据传送到另一个节点只需很短的距离，该网络需要的能量就更少。
It needs less power because the data travel only a small distance to another node.
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