Backtrack is a Linux-based operating system used for network security and penetration testing. It comes with a wide range of security and forensic tools that can be used to test the security of a network and detect vulnerabilities. Backtrack also provides a user-friendly GUI that makes it easier to access and utilize the various tools that come with the system. To get started with Backtrack, you will need to download the latest version and install it on your computer. After installation, you can begin using the various tools to assess and test the security of your network.