仲裁环路（arbitrated loop），如果算上连接到一个光钎连接控的端口它支配 127 个设备。仅仅一个连接可能是一个连接孔。设备在一个单行道环方式下被连接 也叫做 FC-A L 一个不需要光纤通道转换器光纤通道拓扑。

A private arbitrated loop is a configuration where up to 126 devices can be attached. The attachment point called NLport

(loop ports). FC-AL is a low cost connectivity solution because it does not require expensive switching devices.