How does OWASP ZAP function when used for performing web application assessments?

Describing ZAP as non-transparent is inaccurate because ZAP intercepts traffic in a way that is transparent to the target application - the server processes requests without detecting the proxy in the traffic path.

ZAP is not limited to Java servers or JSP pages; it is language and platform agnostic, working with any web application regardless of the server-side technology stack.

ZAP does not operate only as a passive sniffer; it actively intercepts, replays, modifies, and fuzzes HTTP requests as part of active security assessment.

OWASP ZAP is positioned as a proxy layer through which all traffic between the attacker's browser and the target web application flows, making it transparent to the backend application infrastructure and database. The target web application and its backend database process requests normally while ZAP intercepts and analyzes the HTTP/HTTPS communication. This architecture allows ZAP to perform active scanning, passive analysis, and request manipulation for comprehensive web application security assessment.