Fibre Channel Arbitrated Loop (FC-AL) is the most frequently used Fibre Channel (FC) topology. With this FC topology, the L_Ports of servers and storage are interconnected via hubs to form a redundant double ring. With this topology, up to 126 devices can be connected at 100 MB/sstorage band width, but they must share bandwidth with each other.
The number of devices connected to an arbitrated loop is related to the limited addressing option of 8 bits in the FC-AL protocol. FC-AL does not use a token in the ring topology and does not impose a time limit on the devices for loop control.data security and availability.