【摘要】 结合我国铁路通信网的现有发展状况 ,比较了国内外 DDN的发展历史 ,以及不同类型通信网的优缺点 ,对铁路 DDN建设发展的可行性进行了分析 ,并在此基础上对网络的拓扑结构、业务提供以及网络管理进行初步规划更多还原

【Abstract】 The article presents a comparision between foreign and domestic DDN,discusses the advantage and disadvantage of different communication network according to the development status of China Railway communication network.Meanwhile,the topology,service and management of Railway DDN is lain out based on a feasibility study.更多还原