There are three subcategories for Components : These are simple devices that only communicate through their analog or digital slots. They typically does not have a network interface and rely on the MCU-PT or SBC-PT for network access. Components are physical objects that connect to microcontroller (MCU-PT) or single boarded computers (SBC-PT).They are separated into 4 subcategories : Home, Smart City, Industrial, and Power Grid. Smart Things are physical objects that can connect to the Registration Server or Home Gateway through a network interface.In addition to classical network devices such as routers and switches available in the previous versions, Packet Tracer 8.2 Components Box now contains a wide variety of Smart Things and components : Things and Components available in Packet Tracer 8.2