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一、域名系统是什么域名系统(Domain Name System,DNS)是Internet上解决网上机器命名的一种系统。就像拜访朋友要先知道别人家怎么走一样,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,TCP/IP(传输控制协议/网际协议)中的IP地址是由四段以“·”分开的数字组成,记起来总是不如名字那么方便,所以,就采用了域名系统来管理名字和IP的对应关系。二、Internet域名系统的结构及运行Internet域名系统是一个树型结构,其形式如下:
First, the domain name system is what Domain Name System (Domain Name System, DNS) is the Internet to solve online machine named a system. Like visiting friends to know how other people go, Internet fooling one host to access another host must first know its address, TCP / IP (Transmission Control Protocol / Internet Protocol) in the IP address is four Paragraph to “· ” separate numbers, remember always less convenient than the name, therefore, adopted a domain name system to manage the name and IP correspondence. Second, the structure and operation of the Internet domain name system Internet domain name system is a tree structure, its form is as follows: