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现在条件越来越成熟,出现了数字用户线(xDSL)技术。网络业的基础结构正在经历一场变革:从用户拥有并操作的专用网络转变成公共访问服务和专用虚拟网络的增值部分。主要的增长因素是,企业和用户对Internet和World Wide Web上更多的多媒体信息的使用。另一个因素是网络设备的价位令人可按受,使大量用户得以远程访问组织信息。美国及遍及全世界的远程通信业的开放,鼓舞着这一事业不断推出新服务,这是通过本地电信业主互交换电信业主(IEC)、Internet服务商(ISP)、竞争访问提供
Now conditions are more mature, there has been digital subscriber line (xDSL) technology. The infrastructure of the networking industry is undergoing a revolution: from a private network owned and operated by users to a value-added part of public access services and private virtual networks. The main growth factor is the use of more multimedia information by businesses and users on the Internet and the World Wide Web. Another factor is the affordability of network devices, enabling large numbers of users to remotely access organizational information. The opening up of the telecommunications industry in the United States and throughout the world has encouraged the continuous introduction of new services through the exchange of telecommunications owners (IECs), Internet service providers (ISPs), competitive access providers