Which of the following DITSCAP phases validates that the preceding work has produced an IS that operates in a specified computing environment?

Phase 2 of DITSCAP is 'Verification,' which assesses the security requirements and design of the IS, not its operational validation in the environment.

Phase 4 of DITSCAP is 'Post-Accreditation,' which involves continuous monitoring and managing the security posture of the accredited system over its lifecycle.

Phase 1 of DITSCAP is 'Definition,' where the system's mission, environment, and security requirements are identified and documented.

DITSCAP (DoD Information Technology Security Certification and Accreditation Process) Phase 3, known as the 'Validation' phase, focuses on verifying that the developed system operates securely in its intended environment and satisfies all defined security requirements before accreditation.