simple theoretical 802.1x question

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From: Maarten (maarten_ve_at_nospamhotmail.com)
Date: 06/20/04 

Date: Sun, 20 Jun 2004 09:38:16 GMT

When using a 802.1x compatible switch you can select a specific port to use
authentication or not. If a person authenticates correctly the specific port
is opened and only then all trafic is allowed to go through.

But how is this done in WiFi Access points? How is it possible to allow (and
authenticate) several users on what seems to one port? When a port is
openend, does it not allow all trafic, so other users can take advantage of
this?

There is probably something wrong with my way of looking at it, but I would
like to be corrected ;)

Thank you

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