What is the Internet of Things (IoT)?

The Internet of Things connects devices that sense or act on the physical environment through networks. Systems involve sensing, computing, communication and, when needed, actuation. Smart meters, environmental monitoring and connected production equipment are different examples.

How does data move from a sensor to an application?

A sensor measures a quantity such as temperature or movement. A device can process the reading locally, forward it through a gateway or send it to a remote service. An application displays results or activates equipment under specified rules, for example ventilation controlled by temperature. Devices need not be directly exposed to the public internet: local networks and gateways provide different arrangements. Sampling frequency, battery life, delay and connection quality affect design. Faulty sensors or lost connectivity undermine assumptions that readings are current and correct.

Why do security, privacy and lifecycle matter?

A connected device must be assessed for collected information, updates and access rights as well as physical function. Default accounts, unnecessary interfaces and outdated software can create risks. Users need to understand data location, retention and sharing. Essential functions may need to survive internet or cloud outages. Processes affecting physical safety require plans for failures rather than unconditional trust in one reading. Account links and stored information should be removed securely at retirement. The label smart does not itself guarantee safety or accuracy.