Analyzing the Evolution and the Future of the Internet Topology Focusing on Flow Hierarchy

Table 4

Average number of links between modules.

Tier-1	989.54	158	624.31	0.54	22.77	0
Sub-Tier-1	191.03	75.23	160.82	2.31	14.31	0
Tier-2	52.76	29.39	52.63	0.93	7.74	0.03
Tier-3	16	11.33	33.08	0.58	2.42	0.17