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英语翻译The InternetWhat exactly is the Internet?First,the word

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英语翻译
The Internet
What exactly is the Internet?First,the word internet (also internetwork) is simply a contraction of the phrase interconnected network.However when written with a capital "I'' the Internet refers to a worldwide set of interconnected networks,so the Internet is an internet,but the reverse does not apply.The Internet is sometimes called the connected Internet.
The Internet consists of the following groups of networks:
* Backbones:large networks that exist primarily to interconnect other networks.Currently the backbones are NSFNET in the US,EBONE in Europe and large commercial backbones.
* Regional networks connecting,for example,universities and colleges.
* Commercial networks providing access to the backbones to subscribers,and networks owned by commercial organizations for internal use that also have connections to the Internet.
* Local networks,such as campus-wide university networks.
In many cases,particularly for commercial,military and government networks,traffic between these networks and the rest of the Internet is restricted.
英语翻译The InternetWhat exactly is the Internet?First,the word
互联网
互联网到底是什么?第一,简单地说互联网这个词就是“相互连接的网络”的缩写.然而,当用首字母“I”的单词Internet时,指的就是世界范围内相互连接的网络设置.所以这个“Internet”指的就是一个网络.但是翻过来网络就不一定是“Internet”了.
“Internet”又是被称为连接起来的网络.
“Internet”包括以下几组网络“
广域网:是一种主要用于与其他的网络进行连接的网络设置.现在美国的NSFNET和欧洲的EBONE(欧洲主干网)是主要的商业广域网.
区域网:如连接学校间的教育网.
商业网络:提供客户与公司的广域网相通的渠道,由商业组织拥有用于内部使用,也用于与外网相通.
局域网:如大学里面的校园网.
许多情况下,尤其是用于商业、政府、军事的网络,外界网是不允许进入的.