Computer networks link computers by communication lines and software protocols,allowing data to be exchanged rapidly and reliably.
计算机网络通过通信线路和软件协议将计算机连接起来，使数据能够快速、可靠地交换。最初，网络用来提供计算机终端访问和计算机之间的文件传输的功能，如今，网络提供传递电子邮件、访问公共数据库和电子公告板的功能，并已开始用于分布式系统
最初，网络是用来提供计算机终端访问和计算机之间的文件
传输的功能，.如今，网络提供传递电子邮件，访问公共数据库
和电子公告板的功能，并已开始用于分布式系统。
Originally, the network was used to provide terminal computer access and file transfer between computers. Today, the network provides E-mail transfer, access to public databases and bulletin boards, and has begun to be used in distributed systems.
Networks also allow users in one locality to share expensive resources, such as printers anddisk-systems.
网络还允许一个地区的用户共享昂贵的资源，例如打印机和磁盘系统。