What is the Doorway Pages & Clocking?

[joelgarner]

Can anyone tell me What is the Doorway Pages & Clocking?


thanks

[guptaarun]

I don,t know more about this but only know that this is black hat seo techniques. Any one know about this then reply us in brief, we are waiting your reply. Thanks.

[LiveCity]

Google is your friend here:
http://en.wikipedia.org/wiki/Doorway_page
http://en.wikipedia.org/wiki/Cloaking
Simple enough, is it not?