As a CISO I would implement these protections Redundancy: Implementing redundancy in critical systems and infrastructure can help ensure that if one component fails, the others will continue to function, reducing the risk of a complete system outage.

Load Balancing: Load balancing is the practice of distributing workloads across multiple systems to ensure that no single system is overwhelmed. This can help prevent a single point of failure and ensure the continued availability of systems.

Security Information and Event Management (SIEM): SIEM systems can be used to monitor logs and events from various systems and applications in real-time. This can help detect and respond to potential security incidents and help ensure the continued availability of systems.

Network Segmentation: Network segmentation involves dividing a network into smaller, isolated segments. This helps prevent the spread of malware or other threats and can help ensure the availability of critical systems even if other parts of the network are impacted.

Regular Maintenance: Regular software and hardware maintenance can help prevent system failures and ensure that systems remain up-to-date and secure.

Security Awareness Training: Security awareness training can help ensure that employees understand the importance of keeping systems available and the role they play in maintaining the availability of systems.