DNS Computers Networks ( For other articles CLICK HERE )

Every web site has a name, of course, like for instance, www.google.it and so on.

Its file are on a server that is a computer in some part of the world.

So when we write a domain name ( www.google.it ) in the address line of our browser, we can see the web site we were looking for.

But computers do not work with real names but with numbers only. So there must be a way to let them understand what we are writing in our browser.

DNS - Domain Name service - is a system which translate a domain name into numbers.

The web site www.google.it is translateted into 216.239.39.104. Infact if we write this numbers in the address line of our browser, we are redirected the web site symantec.com

This numbers are the IP - Internet Protocol - address.

Any computer connected to the Internet has a unique IP address, in the form of XXX.XXX.XXX.XXX, where XXX is an integer between 1 and 255. This number identifies the computer and the network to which it is connected.

There are a lot of computers all around the world acting as DNS servers, which have large database of IP addresses corresponding to domain names.

The whole Internet is divided in zones with a DNS server.

( To be continued, together with other articles, - CLICK HERE )

DNS computers networks

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