A data network arrangement in which all the devices are connected to a common hub is known as a(n) _____.

A data network arrangement where all devices are connected to a common hub is referred to as a star topology. This structure involves a central hub or switch that acts as a focal point for the connections to various devices. In a star topology, each device (such as computers or printers) has its own individual connection to the hub, which facilitates communication between devices.

This setup is advantageous because it allows for easy addition or removal of devices without disrupting the entire network. If one connection fails, the rest of the network remains operational. Moreover, centralized management through the hub simplifies troubleshooting since all traffic passes through one point, making it easier to identify issues. Overall, star topology is popular due to its robustness and ease of use in various networking scenarios.