This essay provides a comprehensive overview of cyber security, defining it as the protection of computer systems and networks. It explores the growing importance of cyber security due to increased reliance on wireless devices and the challenges of protecting consumer data from malicious attacks. The essay delves into the key aspects of cyber security, including people, processes, and technology, emphasizing the role of processes in mitigating cyber threats. It examines the various elements of cyber security, such as network, application, and data security, and discusses the common security threats like denial of service attacks, malware, and ransomware. The essay highlights the importance of technologies like one-time passwords, cryptography, and encryption in enhancing data security. It also explores the limitations of cyber security and presents solutions such as encryption, robust techniques, and firewall software to enhance data protection and improve the overall security posture of computer networks.