How to map URL with any other URL

Hey friends now i come with one more intresting trick to map your URL with other

Suppose I want to map the URL of my college with facebook.

then,
First of all you need to get the IP Address of a facebook website.
so for this i use ping.

 I got the IP address of facebook i.e
66.220.158.18

now type in Run

now it will open a window of drivers now goto "etc" folder

then open hosts file in notepad
now go at the end of file and type the facebook IP address and my college websitename an d save the file
as shown below.

Now restart your browser an d type the website you will get facebook
thank you.

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