שאלה | What is the structure of the data transmission protocol and what is the reason?

What is the structure of the data transmission protocol and what is the reason?

		The structure is similar to MQTT, the reason is because it’s commonly used
		The structure contains two parts header and data, the reason is the data should be light weight to reduce data transmission
		The structure contains data, the reason is the data should be light weight to reduce data transmission
		The structure like HTTP data packed, the reason is that it’s very simple to use and very reliable