How is DAST typically conducted according to its description?

Dynamic Application Security Testing (DAST) is a security testing methodology designed to analyze applications while they are running. This process typically involves testing live systems in real-time, simulating the actions of an attacker to identify potential vulnerabilities without the need for prior knowledge of the underlying source code or architecture. By examining the application in its operational environment, DAST tools interact with the application just like an end user would, which uncovers security issues that might not be evident through static analysis.

Conducting DAST against live systems allows for the evaluation of how an application handles user inputs, session management, and various forms of input manipulation, thereby providing insights into security vulnerabilities such as SQL injection, cross-site scripting (XSS), and other runtime issues.

The focus on live systems sets DAST apart from other testing methods that may rely on source code access or pre-defined scenarios, allowing for a more comprehensive assessment of security postures in real-world conditions. This makes it an essential part of a holistic approach to application security.