ring topology

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Computer Science One of the three principal topologies for a LAN, in which all nodes are arranged in a circle.

Wiktionary

1. n. computing A network topology in which, in the physical case, every node of a network is connected to exactly two other nodes: one node designated as upstream and the other as downstream. A given node receives data from its upstream node and sends data to its downstream node.