Fig. 7

State diagram for parallel rejuvenation of a system with n=3 nodes, under a particular choice of sequential attack. Each circle represents the set of 3 nodes and their states. For parallel rejuvenations, the order in which nodes are intruded is irrelevant, and only the number of intruded nodes matter. Thus, a more general interpretation (suitable also for the case of parallel attack), considers that each circle with i triangles in state I is representative of all global states with exactly i nodes intruded