CompTIA Network+

Answer: B - In a Ring topology, a node can communicate only with its upstream and downstream neighbors.

Key Takeaway: With the Ring topology, the nodes in the network are arranged in a circular format, similar to a ring. Each node can only communicate with the nodes directly next to it. Those nodes are called the “upstream” and “downstream” nodes. The positive aspect of this type of network are that when something goes wrong, it is immediately evident. However, this is also one of the bad things about this type of topology; if one node should fail, the entire network also goes down. Also, this type of network is not very scalable. If another computer is to be added, it must go in between two already configured devices. And those two devices will also need to be reconfigured to communicate with the new device. Due to the disadvantages of ring topology, it is rarely used in networks today.