An Internet software application requires authentication before a user is permitted to utilize the resource. Which testing scenario BEST validates the functionality of the application?

Reasonable data testing focuses on verifying that an application correctly handles typical, expected input data values, not on validating authentication or session management workflows.

Input validation testing is concerned with ensuring the application properly handles and sanitizes user-supplied input to prevent injection attacks, not with verifying the authentication and session control mechanisms.

Web session testing specifically validates the mechanisms by which a web application manages user authentication, session creation, session tokens, and access control - all critical when a user must authenticate before using a resource. This type of testing verifies that sessions are properly initiated after valid login, that unauthorized users are denied access, and that session tokens are securely handled and invalidated upon logout.

Allowed data bounds and limits testing checks whether an application correctly enforces minimum and maximum data value constraints, which is unrelated to validating user authentication and session management functionality.