I've tried to research on google, but I haven't found much on wireless penetration testing. I'm not really looking for a tutorial on how to do it, more of just the theory behind it. I don't understand really how a laptop can connect to a secured network without the network key. Would the cracker sniff packets for the key or try by other means (breaking in from the internet and setting up a zombie for use as a backdoor for example)? Knowing this could help me secure a wireless network if asked to. Any help would be appreciated. Thanks.