1. Device Gateway: This is the component of AWS IoT Core that securely connects devices to the cloud. It allows devices to securely and reliably communicate with each other and the AWS cloud. Example: AWS IoT Core can be used to connect devices such as light bulbs, cameras, and other sensors to the cloud.

2. Device Shadows: Device Shadows are virtual representations of devices that are stored in the cloud. They store the current state of the device and allow you to interact with the device from the cloud. Example: You can use Device Shadows to create a virtual representation of a light bulb in the cloud. This allows you to control the light bulb from the cloud, even when the physical device is not connected.

3. Rules Engine: The Rules Engine is a component of AWS IoT Core that allows you to process incoming data from connected devices. It allows you to define rules that trigger actions when certain conditions are met. Example: You can use the Rules Engine to create a rule that sends an email notification when a temperature sensor connected to AWS IoT Core reads a temperature above a certain threshold.

4. Security & Identity: AWS IoT Core provides a secure platform for connecting devices to the cloud. It provides a range of security features such as encryption, authentication, and authorization. Example: You can use AWS IoT Core to securely authenticate devices before they can connect to the cloud.

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