IoT Application Protocols, Different communication paradigm and CoAP

Video covers IoT application protocols, what are the different communication paradigm followed by HTTP, CoAP, MQTT and differences among them. It covers CoAP in details, with message types, what is the usage of confirmable and non confirmable messages, Token ID. It also covers how CoAP extension can be added in chrome browser for downloading the extension please refer: https://github.com/mkovatsc/Copper4Cr It also talk about CoAP and security options available.