说明：  arp攻击解决方案从影响网络连接通畅的方式来看，ARP欺骗分为二种，一种是对路由器ARP表的欺骗；另一种是对内网PC的网关欺骗。
(arp attacks from affecting network connectivity solutions to smooth the way of view, ARP spoofing is divided into two kinds, one is cheating the router ARP table the other is the internal network PC' s gateway to deceive.)