Emphasize that an attack is a deliberate act that exploits a vulnerability to compromise a controlled system. This attack can consist of specially crafted software that attackers trick users into installing on their systems.

State that the most common form of software attacks is malware, viruses, worms, back doors, denial-of-service (DoS) and distributed denial-of-service (DDoS) attacks, e-mail communication, and communication interception attacks.