Penetration testing covers various aspects of cybersecurity, from network security (internal and external) to web and mobile applications, ensuring protection against threats like SQL injection and XSS. Cloud and IoT testing identify misconfigurations, while wireless network assessments enhance Wi-Fi security. Social engineering simulations test resilience against phishing and physical breaches, while source code reviews uncover security flaws. Red teaming replicates advanced cyberattacks, API security testing protects endpoints, and OT penetration testing strengthens industrial systems. These combined efforts ensure a robust defense against evolving cyber threats.