IT and Security teams navigate tangled webs of legacy systems, modern apps, and the rise of Shadow AI, all while being held to the highest standards of security, performance, and operational simplicity. Most networks were never designed for this reality. Managing fragmented security tools across inconsistent environments incurs increased risks and costs. We wrote this guide to help you run a successful, hands-on Cisco SASE Proof of Concept (PoC). Built for technical practitioners like you—network and security engineers, IT administrators, and architects—it provides a clear, phased approach to deploying, testing, and validating key SASE use cases in your own environment.