【建站百科】域名系统DNS是什么？利用好DNS我们可以做哪些事情
随着网络的发展，时代的变迁，互联网给人们带来重大的影响，促进了人们的学习思路，现在我们学习遇到不懂的问题，打开电脑在浏览器中查找我们不懂得问题便会有很多网友给我们解决的办法，相当便捷，今天小编为大家讲解一下互联网中的域名系统DNS。
DNS是什么呐？小编在这里告诉大家，所谓DNS就是域名，也就是我们打开电脑在浏览器输入的网址，为了能够精准地找到我们需要的信息网站，每个网站都会有名字，就像我们人一样，想要找人，我们要知道他的名字，也要知道身份证号，这样我们便可以找到具体的人，网站也是如此，我们在网上查询一个网站，我们要知道名字，但是在网站中我们所查询的是关键词，像人一样重名的多，所以我们有身份证号，网站便有域名也就是DNS。
DNS域名系统是因特网使用的命名系统，用来把便于人们使用的机器名字转换为ip地址，域名系统其实就是名字系统，为什么不叫名字而叫域名呐？这是因为在因特网使用的过程中出现了很多的域，所以称之为域名。
一个域名需要解析到我们的服务器中，因为域名到ip地址解析是由分布在因特网上的许多域名服务器程序共同完成的，域名服务器在专设的节点上运行，我们把运行域名的服务器称之为域名服务器。这样我们的网站才可以通过各大浏览器搜索的到，输入我们的域名便可以看到我们网站里面的内容。
域名一共分为四类域名，我们常见的域名是，CN、COM这两大域名，四类域名分为，顶级域名、二级域名、三级域名、四级域名、而我们经常见得CN、COM、便是顶级域名，其中COM属于国际企业域名，CN属于中国域名，顶级域名是采用ISO的规定而制定的，比如说CN表示中国域名，US表示美国域名、UK表示英国等等。
小编给大家普及几个常见的域名， COM代表的是公司企业、NET表示网络服务类型、INT国际组织、ORG表示非盈利组织。
域名是和服务器绑在一起的，所以我们所能看到的网站都是独一无二的，因为一个域名只能出现一次，在这里小编可以告诉大家，有一个自己的网站可以做很多有趣的事情。
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