_________ is a defense of the system against internal and external attacks.

• A. Defense
• B. Security
• C. Protection
• D. Quarantine

Answer: (B)

The concept of security encompasses a range of strategies and measures designed to protect a system from both internal and external threats. Security includes the implementation of protocols, policies, and technologies that safeguard sensitive data, ensure confidentiality, and maintain the integrity and availability of systems. This involves not just defending against direct attacks, such as hacking or malware, but also protecting against potential internal vulnerabilities, such as insider threats.

While the other terms may relate to specific aspects of safeguarding a system—such as protection focusing on physical and logical barriers or quarantine addressing the isolation of potentially harmful elements—security is the comprehensive term that captures the ultimate goal of defending a system robustly against all possible threats. Therefore, selecting security reflects the broader framework necessary to ensure the safety and resilience of computing systems against a wide array of attack vectors.