In which network topology are devices arranged in a circular loop?

The correct choice is the ring topology, where devices are arranged in a circular loop. In this configuration, each device is connected to exactly two other devices, forming a closed loop. Data travels in one direction (or in both directions in some variations) around the ring, passing through each device until it reaches its destination. This setup allows for a straightforward path for data transmission, but it can be susceptible to failure if one device in the loop goes down, as that could disrupt the entire network.

Mesh topology consists of devices interconnected in a way that each device is connected to multiple others, enabling a robust and fault-tolerant network, but it does not conform to a circular arrangement. Bus topology uses a single communication line where all devices share the same channel, arranged linearly rather than in a loop. Star topology has all devices connected to a central hub or switch, rather than in a circular formation. Thus, the defining characteristic of the ring topology is its circular arrangement, making it the correct answer.