GB/T 15274-1994 in English

《GB/T 15274-1994信息处理系统 开放系统互连 网络层的内部组织结构》由TC28（全国信息技术标准化技术委员会）归口，TC28SC6（全国信息技术标准化技术委员会数据通信分会）执行，主管部门为国家标准化管理委员会。
本标准提供一个OSI网络层的体系结构模型作为OSI网络层标准化的框架，以使现存网络纳入OSI体系结构。该框架鼓励设计完全支持OSI网络服务的实子网，同时也适应不完全支持OSI网络服务的其他子网加入到OSI环境中来。本标准预期用于网络层协议的设计和应用两方面，这些协议或是在提供OSI网络服务的端系统中或是在提供路由选择和中断功能的中间系统中的网络实体间进行操作。本标准应用于：a.提供一套在网络层标准中使用的通用的概念和术语（这些网络层标准应引用本标准)；b.分析网络层的功能度并对网络层协议进行分类；c.规定应如何使用“实网络”来支持或提供OSI网络服务，尤其在多个“实网络”要互连和使用的情况下更应如此。这里定义的组织结构不涉及网络层管理，尤其不涉及用于网络层管理目的而可能要求的网络层实体间的关系。另外，本标准不规定中间系统内中继功能的操作要求，也不涉及如何能把允许功能的特定组合加以实际有效地利用。

Scope

This standard provides an OSI network layer architecture model as a framework for OSI network layer standardization, so that existing networks can be incorporated into the OSI architecture. The framework encourages the design of real subnets that fully support OSI network services, and also accommodates the addition of other subnets that do not fully support OSI network services into the OSI environment. This standard is intended for both the design and application of network layer protocols that operate between network entities either in end systems providing OSI network services or in intermediate systems providing routing and relaying functions. This standard is intended to: provide a common set of concepts and terminology used in network layer standards (these network layer standards should refer to this standard); analyze the functionality of the network layer and classify network layer protocols; specify how the " This is especially true when multiple "real networks" are to be interconnected and used. The organizational structure defined here does not address network layer management, and in particular does not relate to the relationships between network layer entities that may be required for network layer management purposes. In addition, this standard does not specify operational requirements for relay functions within intermediate systems, nor does it address how specific combinations of permitted functions can be used effectively in practice.