A positive-feedback preference (PFP) model that accurately reproduces many topological properties of the autonomous system (AS) level internet was introduced. It included degree distribution, rich-club connectivity, the maximum degree, shortest pathlengths, short cycles, dissociative mixing and betweenness centrality. The PFP means that, with the acquisition of new links by the nodes, the relative advantage when competing for more link increased as a nonlinear feedback loop. This indicated that the inequality in the link-acquiring ability between rich nodes and nonrich nodes increas as the network evolved.