Cato Networks is not a traditional SD-WAN appliance with security bolted on—it’s a cloud-native SASE platform where networking and security converge inside a global PoP-based backbone. This deep technical guide breaks down how Cato actually works under the hood, from Socket-to-PoP datapaths and single-pass security inspection to multi-cloud connectivity, China architectures, resiliency behavior, and real-world evaluation criteria senior engineers should test before choosing a platform.