这个代码应用在笔记本中，利用笔记本中两个网卡实现路由功能，本段程序仅仅演示了ping命令，需要另外一个电脑和交换机与本电脑组成内网，本笔记本无线网卡对外形成另一个网络-This code is used in the notebook, using two network adapters in the notebook to achieve the routing function, this paragraph, the program only shows the ping command