What measures protect U.S. critical infrastructure against cyber threats, and how is coordination with the private sector managed?

• A. Cyber hardening and redundancy alone, with no incident response.
• B. Public-private partnerships only.
• C. Incidents response without any preventive measures.
• D. Cyber hardening, redundancy, incident response; public-private partnerships coordinate defense and resilience.

Answer: (D)

Protecting U.S. critical infrastructure against cyber threats relies on a layered approach that blends technical safeguards, resilience planning, and strong collaboration with the private sector that owns and operates much of the infrastructure. Cyber hardening reduces vulnerabilities through secure configurations, timely patching, robust access controls, multifactor authentication, and network segmentation. Redundancy preserves operations by duplicating critical components, maintaining data backups, and ensuring diverse pathways to essential services so a breach or failure doesn’t cause a total outage. Incident response ensures rapid detection, swift containment and eradication, and a structured recovery, with lessons learned driving continuous improvement. Public-private partnerships coordinate defense and resilience by sharing threat intelligence, aligning standards and best practices, conducting joint exercises, and synchronizing efforts across sectors. Government and private sector entities work together to protect, detect, respond, and recover more effectively than either could alone. The other options omit one or more of these essential elements, making them insufficient for comprehensive protection.