Definition
Security refers to the protection of systems, networks, and data from unauthorized access, use, disclosure, disruption, modification, or destruction. It involves implementing a range of measures, including technical controls like firewalls and encryption, administrative policies, and physical safeguards. In the professional world, understanding and maintaining security is paramount to prevent data breaches, protect sensitive information, and ensure business continuity. For instance, a cybersecurity analyst might implement multi-factor authentication to secure user accounts, preventing unauthorized logins. A common confusion is equating security solely with antivirus software, whereas it encompasses a much broader set of practices and technologies. Accurate exams for this domain include certifications like CompTIA Security+.