Cybersecurity involves protecting computer systems, networks, and data from theft, damage, or unauthorized access. It's a critical field that encompasses a range of practices, technologies, and processes designed to safeguard devices, infrastructure, and information from attacks, hacks, or breaches. Key aspects include application security, network security, information security, operational security, and disaster recovery, all aimed at defending against a continually evolving array of cyber threats such as viruses, worms, ransomware, phishing, and DDoS attacks. Effective cybersecurity strategy requires a multi-layered approach, combining technical, organizational, and behavioral measures to protect against both external and internal threats.