Which of the following is NOT a common type of network topology?

The correct answer is that "Circular" is not a common type of network topology. In networking, commonly recognized topologies include star, ring, and hybrid configurations.

The star topology consists of individual nodes connected to a central hub or switch, which manages the network traffic and connections. This structure facilitates easy addition or removal of devices and provides redundancy, as the failure of one node does not impact the entire network.

The ring topology connects each device in a circular arrangement, where data travels in one direction from one device to the next. This setup can enhance transmission efficiency but can be less resilient since the failure of a single device can disrupt the entire network.

Hybrid topology incorporates elements from various topologies, combining features of star, ring, or bus topologies to leverage the advantages of multiple configurations. This adaptability makes hybrid topologies suitable for larger, more complex networks.

In contrast, "circular" is not a recognized topology in networking terminology. While it may resemble a ring topology visually, it lacks distinct characteristics or protocols associated with established network topologies. Therefore, it does not serve as a standard classification in network design.