AI isn’t being limited by compute anymore, it’s being limited by the network. At Networking Field Day 40, Tom Hollingsworth breaks down how AI networking is evolving beyond traditional models and infrastructure. From the rise of “scale across” architectures to the urgent need for next-gen optical technologies like LPO and XPO, the conversation highlights a major shift in how data centers are being designed. As AI moves beyond LLMs toward more dynamic, agent-driven systems, networking is becoming the foundation that determines performance, efficiency, and future innovation.