What is the primary function of a gateway in an IoT network?

The primary function of a gateway in an IoT network is to serve as a bridge that transmits data between various devices and a central platform, often a cloud service or a local server. Gateways play a crucial role in IoT ecosystems by collecting data from multiple devices, converting it into an understandable format if necessary, and then sending it to the central platform for processing and analysis.

This role is vital because IoT devices often operate using different protocols, and the gateway can facilitate communication between those devices and ensure that data is properly transmitted to the appropriate destination. Additionally, gateways can perform tasks such as data filtering, preprocessing, and even local decision-making, enhancing overall efficiency and reducing latency.

In contrast, functions such as acting as a firewall, managing user access, or providing device power are secondary aspects that can be associated with some IoT solutions but do not define the core purpose of a gateway. While some gateways may incorporate security features, user access management, or power delivery, these are not their primary functions in the context of an IoT network. The main role remains focused on data transmission, making option C the most accurate choice.