I want to know is it possible to sniff network traffic between Access Point and a connected client.

e.g. The user has WEP. The key has been found and the intruders can connect to the AP.

Thus, is it possible for them to sniff everything between the client and the AP including MSN chat conversations, http requests and so...

Which tool is used for this job.


P.S. Do not mention LEGAL stuff please.