A ring topology used in Fibre Channel. Up to 127 devices may be attached in the loop, but only two can communicate at the same time, reflecting the channel nature of Fibre Channel technology. To communicate with a device several hops down the ring, each device repeats the data to its adjacent node. See Fibre Channel
This ring topology is widely used and can connect up to 127 nodes without using a switch. All devices share the bandwidth, and only two can communicate with each other at the same time, with each node repeating the data to its adjacent node. TX means transmit, and RX means receive.