目前，Ethernet是应用最广泛的局域网。因此，学习Ethernet技术对深入掌握局域网知识是非常重要的。本课程设计的目的是模拟Ethernet帧的发送过程，使读者熟悉Ethernet帧的数据发送流程，即CSMA／CD工作流程。编写程序模拟Ethernet节点的数据发送流程。-Currently, Ethernet is the most widely used LAN. Therefore, learning to master the LAN Ethernet technology for in-depth knowledge is very important. The purpose of this course is designed to simulate the process of Ethernet frames sent, so that readers are familiar with data transmission processes Ethernet frames that CSMA/CD workflow. Data preparation process simulation Ethernet nodes transmit processes.