目前利用TCP/IP协议安全漏洞进行欺骗攻击的事件经常发生,攻击者通过对主机的ARP欺骗,使其网络在正常连接的情况下出现无法打开网页、频繁断网、IE浏览器出错等问题,极大影响用户使用计算机网络。本文从ARP协议原理分析的角度揭示ARP协议欺骗,并给出相应的防御方法。 At present, attacks that exploit the TCP / IP security vulnerabilities often happen. The attackers, through ARP spoofing on the hosts, make their networks unable to open web pages, frequently break the network, and error in IE browsers due to normal connection. Greatly affect users to use computer networks. This article reveals ARP protocol deception from the perspective of ARP protocol analysis and gives the corresponding defense methods.