The mobile cellular network has its origins in Telco voice networks, but 5G adopts the principles of modern clouds. This book describes how 5G leverages horizontally scalable microservices, Software-Defined Networking (SDN), and cloud operational practices such as DevOps. It provides a detailed introduction to mobile networking that is understandable to a general computing systems audience. Features: "Private 5G networks are something you can touch, code, and deploy yourself. Armed with the knowledge of how 5G access networks work, and with hands-on experience with open source software, just imagine the places you'll go!" - Jennifer Rexford, Princeton University