What is the primary function of a hub in networking?

The primary function of a hub in networking is indeed to broadcast data to all connected devices. A hub operates at the physical layer of the OSI model and serves as a central point where network cables converge. When a hub receives data (in the form of a frame) from one connected device, it transmits that data to all other devices connected to the hub without any filtering or decision-making process. This means that every device connected to the hub receives the same data, regardless of whether it is intended for them or not.

This broadcasting characteristic of a hub is fundamental to how simpler networks are structured, allowing devices to communicate without needing to know specific addresses or manage traffic. However, because it sends data to all devices, it can lead to increased network traffic and potential security vulnerabilities, as all devices can see all the data sent over the network.

In summary, the correct choice emphasizes the hub's role as a simple repeater of data within a network, lacking the intelligence to filter or direct traffic efficiently.