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This paper aims to compare internet measurement data obtained from Skitter, Ark and Dimes by analyzing the internet node degree distributions and correlations at IP node and router level. Further on, it is intended to analyze implications of the internet structure as attained in both its core and edge vicinities.

This comparative analysis was enabled by a data conversion and processing tool‐chain implemented as an extension to the BRITE topology generator which is also introduced.

The results show significant differences in higher nodal degrees. Correlation analysis indicates that DIMES scans discover internet links to a fairly uniform degree, while parts remain invisible within Skitter and Ark data. Mid‐range, oscillating spatial autocorrelations are discovered as a signature of memory effects in internet topology.

Mobile multicast routing performance is quantized by the number of states minimally required for servicing listener or sender mobility. Results show a surprisingly low mobility overhead compared with general multicast forwarding state management. As continuous mobility handovers necessarily occur between access routers located in geographic vicinity, the hypothesis is investigated that geographically adjacent edge networks attain a reduced network distances compared with arbitrary internet nodes. The evaluation of edge distance distributions in different regions for IP ranges, clustered according to their geographic location, reveals a stable correlation of geographic and network proximity at internet edges.

The internet topology has evolved over the past decades in an evolutionary process and continues to grow. Recently, it has attracted much attention from the networking and physics communities, as it forms a unique operational instance of a planetary‐scale network environment. Several measurement projects observing the internet have been undertaken over the past years, out of which Skitter, its successor Archipelago (Ark) and Dimes have been established as continuous recordings of the vivid process of network formation.

This paper aims to discuss problems, requirements and current trends for deploying group communication in real‐world scenarios from an integrated perspective.

The Hybrid Shared Tree is introduced – a new architecture and routing approach to combine network – and subnetwork‐layer multicast services in end‐system domains with transparent, structured overlays on the inter‐domain level.

The paper finds that The Hybrid Shared Tree solution is highly scalable and robust and offers provider‐oriented features to stimulate deployment.

A straightforward perspective is indicated in the paper for a mobility‐agnostic routing layer for future use.