华康医药计算机网络改造项目设计方案2003年5月目录第一章前言..............................................................................................................................................4第二章需求分析..........................................................................................................................................52.1网络系统设计的原则..........................................................................................................................52.2系统需求归纳......................................................................................................................................62.3系统设计目标......................................................................................................................................6第三章总体方案设计..................................................................................................................................73.1核心技术介绍......................................................................................................................................73.1.1局域网技术选型...........................................................................................................................73.1.2虚拟网络的划分...........................................................................................................................93.1.3第三层交换与路由.....................................................................................................................123.2总体方案设计概述............................................................................................................................193.2.1总体方案设计目标.....................................................................................................................193.2.2总体方案设计原则.....................................................................................................................193.1.3网络平台的设计.........................................................................................................................203.1.4主机选型概述.............................................................................................................................203.1.5网络设备选型概述.....................................................................................................................21第四章网络系统设计................................................................................................................................224.1网络拓扑结构....................................................................................................................................224.2整体网络结构....................................................................................................................................234.3企业内部局域网................................................................................................................................244.4INTERNET接入...................................................................................................................................244.5VPN组建...........................................................................................................................................244.6方案特点.........................................................