基于Packet Tracer的HDLC协议数据帧分析

Analysis of HDLC Protocol Data Frame Based on Packet Tracer

本文研究了网络OSI模型中数据链路层HDLC协议的数据帧理论课堂上的教学分析。在数据链路层上完整的HDLC协议的帧包含三种帧,分别是信息帧、监控帧和无编号帧。在这三种帧中,信息帧是最主要的帧,也是在课堂教学上要求学生掌握的一类帧。本文利用PacketTracer模拟软件对数据链路层上数据包传输过程进行了仿真实验,通过两个路由之间封装串行端口为HDLC协议,经过抓包过程,详细分析信息帧的形成和结构,从而让学生更直观地认识和掌握HDLC协议数据帧格式,探索HDLC协议的数据帧在理论课堂上教学方法的改进。

This paper studies the data frame theory of the HDLC protocol in data link-layer of OSI model and its application in analysis of class teaching. A complete HDLC protocol in data link-layer frame contains three kinds of frames：information frame, supervisory frame and unnumbered frame. In these three frames, information frame is the main one, and is to master by students. By using the Packet Tracer simulation software in the process of data link-layer Packet transmission, through two routing encapsulation between serial ports as in HDLC proto-col, after the capture, we make a detailed analysis of the formation and structure of the information frame, so as to help students to understand and master the data frames in HDLC protocol.