This paper introduced operation principle of ARP protocol and relevant knowledge,through analysing the operation principle of Ethernet,propose one kind to understand ARP plan of design of experiment of course of the principle of the protocol.

• 介绍了ARP协议的工作原理及相关知识；通过分析以太网的工作原理；提出了一种更好理解ARP协议原理的课程实验设计方案.