This essay provides a comprehensive overview of cyber security, defining it as the protection of internet-connected computers, software, data, and hardware from cyber attacks. It identifies key elements of cyber security, including application, network, and operational security. The essay details various cyber attacks such as backdoors, denial of service attacks, direct access attacks, eavesdropping, phishing, social engineering, spoofing, and tampering, explaining how each compromises system security. Furthermore, it outlines mitigation techniques for each type of attack, including encryption, filtering, cloud computing, anti-phishing measures, and spoofing detection software. The essay concludes by highlighting the benefits and negatives of cyber security, future developments like machine learning and ransomware resolution, and emphasizes the importance of cyber security in protecting data and systems. Desklib offers this essay and many other resources for students seeking to enhance their understanding of cyber security.