An automated method and system for gaining access to restricted or controlled areas. The invention is characterized in that the cylinder liner ends at most 10 mm below the bottom dead center, and edge regions of the cylinder bore below the cylinder liner consist of the aluminum diecasting alloy. The packet transport node learns correspondence between a logical path of a transport network and a MAC address based on a MAC header of a received packet and learns correspondence between a logical path of a transport network and a logical path used in other network by snooping a routing protocol packet. A third reflective surface is positioned on the first optical element and also reflects light from the light source to the second reflective surface from which light is directed to the image on the first optical element and out through the gap.