文章详细介绍了ARP协议的功能、分组格式和工作原理，分析了当前ARP协议所存在的安全性问题。

This paper gives an introduction to the functions, packet format and working theory of the ARP (Address Resolution Protocol) and analyses the security vulnerabilities that exist in the ARP.

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本文简要介绍了路由器中IP数据包在以太网、X25分组交换网、串行链路上用相应的协议帧格式对IP数据包进行封装的标准和要求。

This paper introduces the standard and requirement for the transmission of IP datagrams over Ethernet, X. 25, Point-to-Point Links in a router.

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