DNS poisioning

DNS- It stands for domain name server. As we know that it is used to resolve the domain name into its corresponding IP. As on internet everything is done using IP address. for example: if we manually input the ip of any site  and a domain name where the domain name will be redirected to the manually entered ip address. this process is known as DNS poisioning. for example if we put the ip of google and domain name of Facebook besides it then when a user will input the domain name for facebook it will show the page of google. The modification is made on the file which is inside the installation folder or windows. If windows is installed in C: drive then its path would be:
C:\Windows\System32\drivers\etc\hosts\
Goto this folder
now open it with notepad.
you will see something written like this:
127.0.0.1   localhost
write the following below it:
209.85.153.104    www.facebook.com
209.85.153.104    facebook.com

note that 209.85.153.104 is the ip of google. when user will enter the url as www.facebook.com or facebook.com then its browser will redirect this page to the google.
so, have fun with your friends using DNS poisioning...........
Do comment if u need any help.....