An IoT (Internet of Things) gateway is a device that acts as a bridge between connected IoT devices and other networks, such as the Internet. It provides a centralized platform for managing and processing data from multiple IoT devices and securely transmitting that data to the cloud or other systems for analysis, storage, and further processing. The IoT gateway can perform various functions, such as data aggregation, protocol translation, security management, and device management.

An IoT gateway builds connections to connected IoT devices through various communication protocols, such as Wi-Fi, Ethernet, Zigbee, Z-Wave, or others. The gateway uses these protocols to communicate with the IoT devices and receive data from them. The gateway can also establish connections to other networks, such as the Internet, through Wi-Fi or Ethernet, to transmit the data it collects from IoT devices to the cloud or other systems for further processing. 

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