Fig. 2From: Influential nodes identification in complex networks: a comprehensive literature reviewThe random network and scale free network a the random network is virtually homogeneous and follows the Poisson distribution. Nearly all nodes have the same number of links. b Scale-free network: An inhomogeneous network that exhibits power-law behavior. The majority of nodes have one or two links, but a few densely connected nodes, or "hubs," have many links.in the scale-free network, the largest hubs are highlighted with dark circles, nodes are presented with white circles [18]Back to article page