Which set correctly lists the four IoT architecture layers?

• A. Sensor, Network, Platform, Application
• B. Sensor, Gateway, Cloud, Analytics
• C. Sensor, Power, Protocol, Application
• D. Device, Network, Platform, UI

Answer: (A)

IoT architectures are described as a progression from sensing to value delivery: sensors or perception collects data, the network handles the data transport, the platform provides processing and storage services, and the application layer delivers the end-user services or insights. That four-layer arrangement matches the set with Sensor, Network, Platform, and Application. The first layer represents sensing and actuation, the second handles connectivity between devices and the cloud or edge, the third offers data processing, storage, and services like device management, and the final layer delivers user-facing functionality. The other options mix in elements that aren’t standalone layers in this abstraction (for example, Power or UI, or components like Gateway or Analytics placed as a layer), which makes them inconsistent with the typical four-layer model.