Cybersecurity protects critical infrastructure by implementing various measures to safeguard systems, networks, and sensitive data from cyber threats. This includes using encryption, firewalls, and intrusion detection systems to prevent unauthorized access and potential disruptions. By continuously monitoring and assessing potential vulnerabilities, cybersecurity professionals can mitigate risks associated with data breaches, ransomware attacks, and other malicious activities. Protecting critical infrastructure, such as power grids, communication systems, and transportation networks, is vital for national security, ensuring the resilience and availability of essential services to the public.