This picture shows a network formed of a single hub. The two sockets along the top edge are designated as "expansion" sockets and the remaining 6 sockets are for Econet stations. Here the expansion sockets are used to terminate the network at either end, when thinking of this small network as a single run working clockwise around the board starting at the top-left edge. In this case, the Clock connects using one socket only to a socket usually set aside for Econet stations.