CISA Domain Review: System Development, Operations & Resilience Explained

How does an enterprise take an IT system from an initial concept to a battle-tested, resilient digital fortress? 🛡️💻 In this comprehensive guide, we walk through the modern IT Lifecycle—from foundational architecture and secure software development (SDLC) to DevSecOps automation, Zero Trust security, and disaster recovery. Whether you are preparing for the ISACA CISA certification, working in IT audit, or designing enterprise systems, understanding how these moving parts fit together is essential.