The origin of DNS

If you set up an Internet connection for your machine then you must have contacted DNS, but what is DNS? It is to be seen that DNS is used to help memory network addresses entirely in order to accommodate human memory thinking.

The full name of DNS is domain Name system when you connect a URL to a www.hotmail.com, you can say that the DNS service is used. But if you know this www.hotmail.com IP address directly input 209.185.243.135 also can reach this URL. In fact, the computer is only using the IP address (finally is 0 and 1) This www.hotmail.com just let people easy to remember and set. Because we humans tend to be much easier to memorize more meaningful text memories (such as www.hotmail.com) than to remember those clueless numbers (like 209.185.243.135). The role of DNS is for us to play a translation between the text and IP to exempt the pain of the memorize number.

If your phone has a name-memory function, you just need to know each other's name and you can dial it to a friend. We can say that the phone has functions like DNS. But what about the DNS system we use on the Internet? It's a lot of clutter. Let's explore the mysteries of DNS.

In the early days of the IP network, each computer was only represented by an IP address. It's hard to remember that some UNIX users have set up a hosts table that corresponds to the IP and host names so that the user can simply enter the computer name to communicate in lieu of IP. If you install the Linux system, you can find the Hosts file under/etc, and you can find it under \WINNT\SYSTEM32\DRIVERS\ETC in the NT system. However, the biggest problem that this hosts file is to be manually maintained by the manager is that it is not suitable for large networks and that updates are a very painful task. This is the time for DNS to come in handy.