This article introduces the concept andworking principles of ARP agreement of internet. After a detailed analyze of attacking technology using ARPagreement, this article give some relevant advices on protection.

• 本文介绍了在计算机网络TCP/IP协议之ARP协议的概念和工作原理,并详细分析了利用ARP协议的攻击技术,并给出了相应的保护对策。