33.040.40 33.200 标准查询与下载

CNS 13928.1-1997 信息技术–免接式网络服务协议–第１部：协议规格

Information technology-Protocol for providing the connectionless-mode network service-Part 1:protocol specification

CNS 13928.3-1997 信息技术–免接式网络服务协议–第３部：Ｘ．２５子网络基本服务

Information technology-Protocol for providing the connectionless-mode network service-Part 3:provision of the underlying service by an X.25 subnetwork

CNS 13928.4-1997 信息技术–免接式网络服务协议–第４部：开放系统互连数据链接服务子网络基本服务

Information technology-Protocol for providing the connectionless-mode network service-Part 4:provision of the underlying service by a subnetwork that provides the OSI data link service