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Banjohunter (talk | contribs) Reverted good faith edits by 182.71.163.6: Not all persistent cookies are used for tracking. In fact, most persistent cookies are used for allowing automatic session establisment when the user returns to a website. (TW) |
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Web browsers normally delete session cookies when the user closes the browser.<ref>{{cite web |url= http://msdn.microsoft.com/en-us/library/ms526029(v=vs.90).aspx |title=Maintaining session state with cookies |work=Microsoft Developer Network |accessdate=22 October 2012}}</ref> Unlike other cookies, session cookies do not have an expiration date assigned to them, which is how the browser knows to treat them as session cookies.
===Persistent cookie
Instead of expiring when the web browser is closed as session cookies do, persistent cookies expire at a specific date or after a specific length of time. This means that, for the cookie's entire lifespan (which can be as long or as short as its creators want), its information will be transmitted to the server every time the user visits the website that it belongs to, or every time the user views a resource belonging to that website from another website (such as an advertisement).
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