Internet of Things (IoT) Practice Exam

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Communication in a network is facilitated by which element?

Router
Device
Sensor
Medium

The correct answer is: Medium

The correct choice emphasizes the fundamental role of the medium in effective communication within a network. In networking terms, the medium refers to the physical pathway, such as cables (fiber optic, coaxial, twisted pair) or wireless signals, through which data is transmitted between devices. Without a functional medium, devices cannot communicate effectively, as the information they generate needs a means to travel from one point to another. The other elements mentioned also play vital roles in a network's operation: routers direct data packets through the network, devices are endpoints or nodes that generate or receive data, and sensors collect information from the environment. However, none of these elements would be able to perform their functions without a reliable medium to enable communication between them. Thus, the medium is an essential component that underpins the entire process of networking and communication.