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局域网(Local Area Network,简称LAN),它是在局域内两个或两个以上的计算机以一定的方式连接,以供用户共享文件、程序、数据等资源。●广域网(Wide Area Network,简称WAN),它是通过长距离连接用户的网络,其连接范围常常跨越城市或国家。●全球信息网(World Wide Web,简称WWW),是基于超文本(Hypertext)的信息检索工具,它通过超链接把世界各地不同Internet节点上的相关的信息有机地组织在一起,用户只需发出检索请求,它就能自动地进行相应的定位,找到相应的检索信息。●综合业务数字网(Integrated Services DigitalNetwork,简称ISDN),是一种完全数字传输方式的数字通信网络,它可以传输语音、视频和数据,计算机和其他设备通过简单的、标准化的接口可以连接到ISDN●电子邮件(Electronic Mail,简称E-mail),就是
Local area network (LAN), which is in the local area where two or more computers are connected in a certain way, for users to share files, programs, data and other resources. ● Wide Area Network (WAN), which connects users’ networks over long distances and often spans cities or countries. ● The World Wide Web (WWW) is a Hypertext-based information retrieval tool that organically organizes relevant information on different Internet nodes around the world by hyperlinks. Users simply send out Retrieve the request, it will be able to automatically locate the corresponding, find the corresponding search information. ● Integrated Services Digital Network (ISDN) is a digital communication network with complete digital transmission that can transmit voice, video and data. Computers and other devices can be connected to ISDN via a simple, standardized interface ● Electronic Mail (E-mail), that is