Backtrack 5 is a Security Essentials
Backtrack is a suite of tools to help with Penetration of any Network, Unix, Linux, or Microsoft Based. Backtrack 5 is good for WEP & WPA hacking and penetration testing.
Penetration testing is a must have for any IT Administrator. With the flexibility of backtrack being able to be run from a Motorola Xoom or Viewsonic Gtablet, Usb Disk, or Live DVD is a great reason to make sure you have a copy stashed away somewhere.
You never know when Network Penetration will be needed.
Back-Trak Site: http://www.backtrack-linux.org