某校有本科生宿舍4座，每座7层，每层10间房，每间房2个学生，。要求对学生宿舍的网络进行设计规划，设计时需满足下列要求：

 　　在宿舍区提供一个学生服务器机房，供学生社团放置各类服务器；

 　　在学生服务器机房，设置一个代理服务器供同学们使用

 　　学校分配了1段C类IP地址给该学生服务器机房，IP地址为202.116.162.0/24。；

 　　拟保证每个学生有一个上网端口；

 　　学生机器采用私有IP地址，通过代理服务器上校外网。

 　　设计时尽量能够减少广播风暴；



请根据以上环境和设计要求设计该网络，完成下列工作并撰写相关文档：

 　　选择相应的网络设备（以Cisco品牌为蓝本，写出参数和数量）；

 　　写出设计方案、画出网络拓扑结构、并阐述设计理由；

 　　写出网络中的主要路由器及主要的交换机作的设置脚本并作简单阐述。

-A school four undergraduate dormitories, 7th Floor, each floor 10 room, two students per room. Requirements of the student dormitory network design and planning, the design must meet the following requirements:

　server room of a student in the dormitory area for student clubs to place the various types of servers

　the student server room, set up a proxy server for use by students

The 　school segment Class C IP address assigned to the the student server room, the IP address is 202.116.162.0/24.　

　intended to ensure that every student have an Internet port

　student machine uses a private IP address off-campus network through a proxy server.

　design as far as possible to reduce the broadcast storm



The design of the network according to the above environmental and design requirements, complete the following tasks and writing documents:

　to select the appropriate network equipment (Cisco brand modeled, write parameters an