Studing for my CCNA wireless. I read that "WEP Key is used to encrypt the clallenge text and it is not used to hide, protect, or encrypt any user data after the client is associated with the AP". Later I read that "after it is associated, the client is issued an association identifier and can begin sending data. From this point on, WEP is used to encrypt traffic". My question is.... is WEP used to encrypt traffic (user data) or not? Or is traffic different from user data? I need help to clarify this point. Thanks.