Reducing the vulnerability of network by inserting modular topologies.

In this paper, we present a strategy whose purpose is to reduce the vulnerability of a network via inserting modular topologies. The modular topologies are generated as WS small-world random network, which is relatively highly robust. Using betweenness and betweenness centrality as the vulnerability measurement, the strategy searches for remote nodes with low betweenness in the network and sets these nodes to be connected to the modular topologies. We test our strategy on some basis networks and the results show sufficient availability of our strategy. And by comparing with other methods of adding topologies into the network, we show that our strategy is especially efficient in reducing the vulnerability of the critical network components.