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Infrastructure Complexity
Figure 4 | Infrastructure Complexity

Figure 4

From: Improving measures of topological robustness in networks of networks and suggestion of a novel way to counter both failure propagation and isolation

Figure 4

A different example case of the influence of node permutability on post attack viability. We use a permutable node that can switch from an uncoupled to a coupled counter-part in components with the following symbiotic viability condition: a component is only alive if at least 1/3 of its nodes are connected to other network. The large network diagrams on the left represent the two different alternative networks made possible by swapping the states of the permutable node. Either the uncoupled counter-part of the node is activated in the black network, or the counter-part in the grey network is activated with an associated interdependent (black) edge, and an extra internal (blue) edge. Disabled nodes and connections in each alternative scenario are shown with dashed lines. After applying the post-attack viability rule, alternative 2 seems to leave the coupled networks in a much better state than alternative 1.

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