Explanation/Notes: Attackers rely on human nature to break into computer systems and networks. They know that, to avoid the hassle of keeping track of several passwords, many people use the same or a similar password on every system they access. As such, the intruder will attempt to learn the password of one system where the target has an account. Once obtained, it's highly likely that this password or a variation thereof will give access to other systems and devices used by the employee.