A must-know for anyone heading into an IoT interview, this question is frequently asked in the internet of things interview questions.  IoT  IoT is an acronym that stands for Internet of Things.  IoT is generally used in home appliances and devices. So, its service model is human-centric.   IoT is used in customer-oriented applications.  It uses wireless devices for communication and transportation.   The quality of data in IoT is medium to high.   IIoT  IIoT is also an acronym that stands for Industrial Internet of Things.  IIoT is used in industry for industrial purposes. So, its service model is machine-centric.  IIoT is used in industry-oriented applications.  It uses both wired and wireless devices for communication transportation.  The quality of data in IIoT is high to very high.