FIGURE 2.1 DISTRIBUTED NETWORKS In a centralized network (a), all the paths lead to a single nerve center. Decentralized networks (b) contain several main nerve centers. In a distributed network (c), which resembles a net, there are no nerve centers; if any connection is severed, information can be immediately rerouted and delivered to its destination. But is there a downside to distributed networks when it comes to the circulation of network viruses? Data from: Katie Hafner and Matthew Lyon, Where Wizards Stay Up Late (New York: Simon & Schuster, 1996).