A tool for working a workpiece has a slot provided between a pair of extremities at its distal end. The mirror assembly is positioned in an inactive portion of the field of view of the camera so that the reflected image of the driver appears in the inactive portion of the field of view in the captured video. Each ring switch has at least one ring port, at least one local port and at least one table that self learns which network devices are associated with each port of the ring switch based on a selected source identifier from the packets processed by the ring switch.