How to block Web Sites without any Softwares

Now i'm going to tell you that how to block any web site without any software.
so follow these small steps.
hope this small trick helpful for you
Steps

1] Browse C:\WINDOWS\system32\drivers\etc
2] Find the file named "HOSTS"
3] Open it in notepad
4] Under "127.0.0.1 localhost" Add 127.0.0.2 sitenameyouwantblocked.com , and that site will no longer be accessable.
5] Done!

-So-

127.0.0.1 localhost
127.0.0.2 www.blockedsite.com

- www.blockedsite.com is now unaccessable


For every site after that you want to add, just add "1" to the last number in the internal ip (127.0.0.2) and then the addy like before.

i.e :
127.0.0.3 site1
127.0.0.4 site2
127.0.0.5 site3
This also works with banner sites, just find the host name of the server with the banners and do the same thing with that ads.