Ch5. CISSP Domain 5 — Key Security Concepts
Overview
This chapter covers key CISSP concepts for Domain 5. The CISSP exam tests your ability to apply security principles to real-world scenarios, not just memorize definitions.
The CISSP exam is a “managerial” exam — always think like a senior security manager, not a technical implementer. When in doubt, choose the answer that emphasizes risk management, policy, and business alignment.
Core Concepts
Understanding CISSP Domain 5 requires integrating knowledge across multiple security disciplines. Key areas include access controls, cryptography, network security, and security governance.
Key Concept Cards
Think Like a Manager ★★★★★ : CISSP tests decision-making at the managerial level. Prioritize risk management and policy over technical implementation details.
Defense in Depth ★★★★★ : Multiple security layers. If one fails, the next defends. No single control is sufficient.
Least Privilege ★★★★★ : Grant only the minimum permissions necessary for a task. The golden rule of access management.
Practice Quiz
Q1. Which principle states that users should have only the access rights necessary to perform their job functions?
The principle of least privilege. It minimizes the potential damage from accidental or intentional misuse of privileges, and reduces the attack surface available to compromised accounts.
Q2. A security breach has occurred. What should be the FIRST response action?
Containment — prevent the breach from spreading further. Immediately isolate affected systems from the network. Then proceed with eradication, recovery, and lessons learned in order.
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