Which three elements help network designers to construct secure systems that protect information and resources (such as devices, communication, and data) from unauthorized access, modification…

Confidentiality ensures that information and resources are accessible only to authorized users, preventing unauthorized inspection or disclosure of sensitive data.

Serviceability refers to the ease of maintaining or repairing a system and is an operational characteristic, not a core information security design principle.

Reliability refers to a system's ability to function consistently over time and is an availability-adjacent operational metric, not a distinct security design principle.

Availability ensures that authorized users can access systems, data, and resources when needed, protecting against disruptions or destruction.

Integrity ensures that data and systems cannot be modified or tampered with by unauthorized parties, preserving their accuracy and trustworthiness.

Scalability refers to a system's ability to grow and handle increased demand and is an architectural concern, not a security design principle.