Network managers and network users are concerned about network access and security. A network manager wants assurance that the client requesting access to his network is really who they say they are - an authorized user and not an imposter. Similarly, a network user wants assurance that when he connects his wireless notebook PC to his network, he is really connecting to his network - and not to a counterfeit network thrown together by a hacker to intercept user information. This paper provides insight into the typical wireless LAN client login process and 802.1X and EAP authentication processes.