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this is for our thesis project. we proposed to study the Wi-Fi security in most related to the users.

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closed as not a real question by Rory Alsop Apr 2 '12 at 12:25

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Hi @Bernadete - welcome to Security Stack Exchange. This question unfortunately does not meet our requirements as it is not answerable, so I have closed it, however it can be reopened if you can edit it into a more answerable form. Have a look at the faq (at the top of the page) for guidance on how to ask a good question. – Rory Alsop Apr 2 '12 at 12:25

The usual method is called "Captive Portal".

When the client first connects, all web page requests are intercepted and sent to the the login page instead. (Any non-web traffic sent at this point is dropped.)

One the user authenticates, the access point notes that it's authenticated, and subsequently allows traffic from that connection through to the Internet.

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