Comparative Study of IoT Protocols and Classification of Cloud Platforms

Nowadays with evolving technologies, it is possible to connect real world with virtual world by using some intelligent sensors or physical object. Internet of Things (IoT) is one of such technology. The rise of interest in IoT is leading to a new era in which all objects, devices and sensors that are connected over the internet. This will change the pattern of how we collect and analyse data to make our systems more efficient. This will in turn improve quality of mankind. Using IoT the user will be able to communicate and control physical devices. This survey paper describes and compares some major protocols like MQTT, AMQP, CoAP, XMPP, HTTP/HTTPS, RESTFUL SERVICES and WEBSOCKETS. Comparison of IoT protocols is done based on parameters like what type of transport, security, Architectural style it provides and how it works in Low power and lossy network. We have mentioned whether the protocol support Publisher/Subscriber mode or Request/response mode for communication. We have also discussed some major cloud platforms that are used in IoT like AWS, AZURE, firebase cloud computing. We have made comparative study on cloud platform based on its computing architecture, services, load balancing techniques and security.