Wow, suntra, I never would have picked up on the fact that english wasn't your native language from your other posts. (edit; that may come across as sarcastic, but I'm being sincere :/)
And I suppose internet site would imply a broader range of features, as in accessible from more than just "the web" - mobile phones, pdas, and the like, perhaps? Or possible that it serves up more than just "web" content - radio streams, possibly, come to mind. I've always used web site, myself.