Define a security perimeter, its components, and the role it plays in architecture.

• A. A boundary separating trusted from untrusted networks; components include firewalls, IDS/IPS, access controls, and monitoring to enforce policy at borders.
• B. A boundary that is only relevant to data centers with no practical components.
• C. An internal network segmentation strategy only.
• D. A legal boundary for data ownership.

Answer: (A)