As a CISO of a publicly traded company, I would implement several different protection policies to ensure the availability of critical systems and services. First, I would establish regulatory backups and disaster recovery plans so that operations can resume quickly if there are any cyberattacks, system failures, or natural disasters. I would also use redundant software and cloud based failover solutions to minimize downtime if a server or network component fails. Additionally, I would deploy continuous network monitoring, intrusion detection systems, and protection against DDoS attacks to help identify threats before they occur.