域名系统协议分析

Analysis on the Protocol of Domain Name System

DNS是Internet上解决网上机器命名的一种系统。在Internet上,当一台主机要访问另外一台主机时,必须首先获知其地址,这就是DNS所要解决的问题。本文介绍了DNS的概念、DNS的组成并对DNS的查询报文和响应报文作了详细分析,从而进一步了解DNS的工作原理。

DNS is a kind of system that solves the machine＇s name in intemet. When a machine wants to visite another machine in internet, it must know another machine＇s address at first, which is DNS＇s function. In this article, introduces the conception of DNS, the composition of DNS and the detail analysis on the query message and the response message so as we can understand the working theory of DNS clearly.