Which protocol does AWS IoT Core support for device connectivity?

AWS IoT Core primarily supports MQTT (Message Queuing Telemetry Transport) as its protocol for device connectivity. MQTT is specifically designed for low-bandwidth, high-latency, or unreliable networks and is highly efficient for remote device communication. It operates on a publish/subscribe model, allowing devices to easily send messages to the cloud and receive messages without needing to establish a direct connection continuously. This makes it particularly well-suited for IoT applications, where devices may be intermittently connected.

While AWS IoT Core also supports other protocols such as HTTP and WebSocket for certain use cases, MQTT remains the dominant choice when it comes to facilitating effective, scalable communication for IoT devices. Its lightweight nature and ability to maintain persistent connections with lower overhead requirements make it ideal for the types of interactions and volume of messages typical in IoT environments.