"No," Alex said, pulling up Lesson 62: Social Engineering & Physical Security . "But I’m going to show you why your 'admin/admin' password is an invitation."

Taking a deep breath, he closed the packet sniffer. Instead, he opened a new terminal and typed:

“To sniff packets ethically, you must own the network or have written permission. Never touch networks you don’t own. That’s the line between a hacker and a felon.”