On power-law relationships of the Internet topology
Proceedings of the conference on Applications, technologies, architectures, and protocols for computer communication
Observing the evolution of internet as topology
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
Testing the reachability of (new) address space
Proceedings of the 2007 SIGCOMM workshop on Internet network management
In search of the elusive ground truth: the internet's as-level connectivity structure
SIGMETRICS '08 Proceedings of the 2008 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Ten years in the evolution of the internet ecosystem
Proceedings of the 8th ACM SIGCOMM conference on Internet measurement
Bigfoot, sasquatch, the yeti and other missing links: what we don't know about the as graph
Proceedings of the 8th ACM SIGCOMM conference on Internet measurement
The flattening internet topology: natural evolution, unsightly barnacles or contrived collapse?
PAM'08 Proceedings of the 9th international conference on Passive and active network measurement
Weighted spectral distribution for internet topology analysis: theory and applications
IEEE/ACM Transactions on Networking (TON)
Network topologies: inference, modeling, and generation
IEEE Communications Surveys & Tutorials
A mutualistic resource pooling architecture
Proceedings of the Re-Architecting the Internet Workshop
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In this paper we study the structural evolution of the AS topology as inferred from two different datasets over a period of seven years. We use a variety of topological metrics to analyze the structural differences revealed in the AS topologies inferred from the two different datasets. In particular, to focus on the evolution of the relationship between the core and the periphery, we make use of a recently introduced topological metric, the weighted spectral distribution. We find that the traceroute dataset has increasing difficulty in sampling the periphery of the AS topology, largely due to limitations inherent to active probing. Such a dataset has too limited a view to properly observe topological changes at the AS-level compared to a dataset largely based on BGP data. We also highlight limitations in current measurements that require a better sampling of particular topological properties of the Internet. Our results indicate that the Internet is changing from a core-centered, strongly customer-provider oriented, disassortative network, to a soft-hierarchical, peering-oriented, assortative network.