###### tags: `Networking` `topology` # MQTT (Message Queuing Telemetry Transport ## Basic concept ![](https://i.imgur.com/Dwb7wIh.png) ## Client Broker Connection Establishment ![](https://i.imgur.com/4bi4nt1.png) ![](https://i.imgur.com/NnBFWcZ.png) ## Packets ![](https://i.imgur.com/CwRWqPt.png) ![](https://i.imgur.com/UaILwgH.png)