Internet in general and Internet of Things (IoTs): layers, protocols, packets, services, performance parameters of a packet network as well as applications such as web, peer-to-peer, sensor networks, and multimedia, transport services, mobile networking which includes roaming and handoffs, mobile IP, and infrastructure-less networks, IoT definitions which include overview, applications, potential & challenges, and architecture, IoT examples such as case studies, e.g. sensor body-area-network and control of a smart home.