第2页共131页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第2页共131页目录前言..........................................................................................................................................6第一章概述................................................................................................................................71.1定义与简称............................................................71.2项目建设背景..........................................................71.3项目建设目标..........................................................81.4方案设计原则..........................................................8第二章需求分析.......................................................................................................................102.1行业需求分析.........................................................102.1.1国内行业现状............................................................................................................102.2网络系统需求分析....................................................102.2.1信息化的扩展............................................................................................................102.3应用系统功能需求分析.................................................112.3.1内部业务系统............................................................................................................112.3.2信息服务网站............................................................................................................11第三章总体解决方案概述.......................................................................................................123.1方案概述.............................................................123.1.1设计原则....................................................................................................................123.1.2设计依据标准............................................................................................................133.1.3总体方案....................................................................................................................133.1.4设计要点....................................................................................................................143.2总体设计.............................................................163.2.1网络构成....................................................................................................................163.2.2系统功能模块简介....................................................................................................263.3系统的扩展性.........................................................26第四章系统结构详细说明.......................................................................................................284.1设计原则.............................................................284.2网络拓扑结构设计.....................................................294.3专线接入INTERNET方式................................................304.3.1X.25线路接入...........................................................................................................304.3.2DDN线路接入..........................................................................................................304.3.3帧中继线路接入...............................................................
