国际标准化组纸已推出一种开放式系统互连七层参考模型,这一模型已得到国际电报电话咨询委员会的承认,成为国际上网络通信的标准化基础。

• The International Standard Organization (ISO) has defined a seven-level reference model that is known as "Open System Interconnection" (OSI). This model has been approved by the Consultative Committee on International Telegragh and Telephone (CCITT), and becomes international standard of network and communication.