Whether we like it or not we are all IT users now. Through the ubiquity of networks of devices that we rely on for information, security and day-to-day transactions even those who eschew technology now rely on it, even if they do not acknowledge it. The failure of these networks can lead to widespread disruption, unhappy customers, unproductive employees and lost business. Ensuring their availability, security and efficiency is a job for experts who need powerful tools to carry out the task.