The document discusses Internet of Things (IoT) protocols. It defines IoT as the infrastructure of the information society and notes the growth and challenges of IoT, including security, existing protocols, and storage. It examines the relationship between protocols and IoT for connecting devices and providing interfaces. The document outlines several common IoT protocols like HTTP, MQTT, and CoAP and discusses the "protocol war" between them. It concludes that different protocols have advantages for different IoT applications and selecting the best-fit protocol is important for success.