I am Xi std. science student. Yesterday I went to my friend’s house. There we decide to go to one entertainment site for downloading new movies and trailers. We both are regular visitors of that site so we both log in to their site from single pc but in different tab window. When I tried to download latest movie from my window it pop ups me a message window. Showing only registered users are allowed to download this movie. So I download it from my friend’s window. He was already registered user of that site. That time one question comes in mind that how server will distinguishes between user to check whether he is registered user or not even when hell amount of peoples accessing same site.
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