本文件通过服务和协议规定了OSI传输层和网络层。它们可以被不同的应用程序使用。 传输层: -将消息转换为单个数据包； -将诊断和节点配置的协议控制信息添加到每个数据包中； -将用于诊断和节点配置的数据包标识符添加到每个数据包中；和 -执行传输协议错误检测。 传输层协议不用于正常通信，只是用于映射OSI下层和上层之间的服务接口参数。 网络层: -在每个段中添加用于诊断和节点配置的节点地址； 和 -观察每个段的诊断和节点配置的时间。 网络层不用于正常通信，只是用于映射OSI下层和上层之间的服务接口参数。

This document specifies the OSI transport layer and network layer by means of services and protocols. They can be used by different applications. The transport layer: — transforms a message into a single packet; — adds protocol control information for diagnostic and node configuration into each packet; — adds packet identifier for diagnostic and node configuration into each packet; and — performs transport protocol error detection. The transport layer protocol is not used for normal communication except to map the service interface parameters between lower and upper OSI layers. The network layer: — adds a node address for diagnostic and node configuration into each segment; and — observes timing for diagnostic and node configuration of each segment. The network layer is not used for normal communication except to map the service interface parameters between lower and upper OSI layers.