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用通信线路把不同地理位置的多个独立的计算机系统连接在一起并配备相应的网络系统软件就构成了计算机网络。计算机网络提供了通信工具,使计算机之间得以实现信息和资源的共享。网络使一个机构或个人同另外一个机构或个人共享信息资源成为可能。网络就是信息和服务的共享。 计算机网络按其通信距离及规模的大小分为广域网、城域网及局域网。最常见为局域网与广域网。局域网通常不超过几十公里,且常建在一幢建筑物内部。广域网的通信距离从几十公里到几千公里。最有名的广域网是Internet网。 计算机组成网络后,计算机网络具有如下功
Using communication lines to connect multiple independent computer systems of different geographical locations and equipped with corresponding network system software constitute a computer network. Computer networks provide communication tools that allow computers to share information and resources. Networks make it possible for an agency or individual to share information resources with another agency or individual. The web is the sharing of information and services. Computer networks according to their communication distance and the size of the size is divided into wide area networks, metropolitan area networks and local area networks. The most common for the LAN and WAN. LAN usually do not exceed tens of kilometers, and often built inside a building. WAN communication from tens of kilometers to thousands of kilometers. The most famous WAN is the Internet. Computer network, the computer network has the following power