Nessus and OpenVAS are two examples of security testing tools that can be used for vulnerability scanning.

Nessus is a commercial vulnerability scanner that can be used to identify vulnerabilities in systems, networks, and applications. It can perform various types of scans such as network scans, web application scans, and compliance scans. Nessus can identify vulnerabilities in a variety of systems such as operating systems, network devices, and applications. It also provides detailed information on vulnerabilities, including the severity of the vulnerability, the risk it poses, and the recommended remediation.

OpenVAS is an open-source vulnerability scanner that can be used to identify vulnerabilities in systems, networks, and applications. It can perform various types of scans such as network scans, web application scans, and compliance scans. OpenVAS can identify vulnerabilities in a variety of systems such as operating systems, network devices, and applications. It also provides detailed information on vulnerabilities, including the severity of the vulnerability, the risk it poses, and the recommended remediation.

Both Nessus and OpenVAS are widely used tools for vulnerability scanning and can be used to identify vulnerabilities in systems, networks, and applications. Nessus is considered more user-friendly, providing a graphical interface, while OpenVAS is considered more complex, providing a command-line interface. Nessus is a commercial tool while OpenVAS is open-source, making it free to use. Nessus has a paid version that offers more features and support, while OpenVAS is a community-driven project, so support may be less reliable. Nessus and OpenVAS can be used in conjunction with other security tools to identify vulnerabilities and improve the overall security of the system.