00889nas a2200157   4500000000100000000000100001008004100002260005000043100001200093700001200105700002400117700001400141245006600155300001400221520049600235       2015                            d  bSpringer International Publishing Switzerland1 aM. Nycz1 aT. Nycz1 aTadeusz Czachórski1 aPiotr Gaj00aAn analysis of the extracted parts of Opte Internet topology.  a371–3813 aThe paper defines a method to extract a part of a graph, which corresponding to a network (Internet) topology covering a certain area. The method refers to data gathered within Opte Project and describing the Internet topology. The extracted parts of graphs have been analyzed in terms of the number of neighbours, longest path length and existence of cycles. Then the resulting topologies are used to model transient behaviour of wide area networks with the use of fluid-flow approximation.