Basic Concepts of Hacking ...

=> Footprinting and Reconnaissance
=> Scanning Networks
=> Enumeration
=> System Hacking
=> Trojans and Backdoors
=> Viruses and Worms

=> Sniffers
=> Social Engineering
=> Denial of Service
=> Session Hijacking
=> Hacking Webservers
=> Hacking Web Applications
=> SQL Injection
=> Hacking Wireless Networks
=> Evading IDS, Firewalls and Honeypots
=> Buffer Overflows
=> Cryptography
=> Penetration Testing