提供OSI网络层的体系结构模型，作为OSI网络层标准化的框架。用于网络层协议的设计和应用。用于为网络层标准提供一套通用的概念和术语；分析网络层功能，对网络层协议进行分类；规定在支持或提供OSI网络服务时使用“真实网络”，尤其是在多个“真实网络”相互连接和使用的情况下。

Provides an architectural model of the OSI Network Layer as a frame for OSI Network Layer standardization. Is intended for use in the design and applicable of Network Layer protocols. To be used to provide a common set of concepts and terminology for Network Layer standards; to analyse Network Layer functionality and classify Network Layer protocols; to specify the use of "real network" in supporting or providing the OSI Network Service, above all, in cases where multiple "real network" are to be interconnected and used.