Abstract: With the erdargement of the Ethemet scale，the threats from inner network have become more and more outstanding．In this paper， both the potential safety hazards ofthe address resolution protocol(ARP)and its would—be threats when used in Ethemet have been markedly analyzed，and also address resolution protocol(SARP)has been introduced here．SARP can realize the safety resolution from IP address to hardware address，thus address information call efectively avoid bt g distorted and replayed by the illegal use who will never carry out dis— guised ARP attacks．

Key words: Ethemet, security, network protocol, rephy attack, integrity check

摘要： 随着以太网规模的不断扩大，来自网络内部的安全威胁越来越突出．本文分析了地址映射协议(ARP)的安全 隐患及其在以太网中可能面对的安全威胁，提出了地址映射协议SARP．SARP通过使用专门的映射服务器可实现 地址到硬件地址的安全映射，可以有效地避免非法用户对地址信息的纂改、重播以及实施ARP伪装攻击．

关键词: 以太网, 安全, 网络协议, 重放攻击, 完整性检查