Most of us take DNS for granted. In our everyday work on the Internet, we use applications that connect to the Internet automatically, without ever actually entering an Internet host name to resolve. And even when we open the browser and type a URL in the address bar, we don’t generally think about what’s happening on the back end to make sure that the name we typed in resolves to the correct IP address.
If you do think about it, though, you’ll realize that being able to use names instead of IP addresses is a huge convenience. Most humans can remember names far more easily than numbers. In the “olden days,” in order to place phone calls, we had to memorize (or look up) telephone numbers. Then speed dial came along, and today many of us couldn’t even recite the phone numbers of our closest friends and relatives because we have them “programmed” into our phones and can call them by simply touching their names in a list (or, to make it even easier, their photos).
