IR is the router level of Internet network. Each node represents a router and each edge is a link between two routers. The data corresponds to the paper of Govindan and Tangmunarunkit, Infocom 2000. Colors are assigned according to the coreness: vertices with coreness 1 are violet, and the maximum coreness vertices are red, following the rainbow color scale. The node degree scale is also displayed, showing the maximum degree of the network. Return <-