Network-on-chip routing schemes 241 Core Core Core Core Core Core Core Switch Core Core Core Core Core Point-to-point network Switch-based network FIGURE 13-2 Point-to-point and switch-based networks. elements. In either case, each processing node requires an input/output (I/O) com- ponent that enables communication with the connected processing element or the connected switch. Networks are characterized by a range of structural parameters, such as node degree (the number of links per node), diameter (the maximum length of the shortest length