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Cloud providers employ sophisticated virtualization techniques and strategies for sharing resources among a high number of largely uncoordinated and mutually untrusted customers. The shared networking environment, in particular, dictates the need for mechanisms to partition network resources among virtual machines. At the same time, the performance of(More)
— For a long time, traceroute measurements combined with alias resolution methods have been the sole way to collect Internet router level maps. Recently, a new approach has been introduced with the use of a multicast management tool, mrinfo, and a recursive probing scheme. In this paper, after analyzing advantages and drawbacks of probing approaches based(More)
An accurate and exhaustive knowledge of the Internet topology is essential for a deep understanding of such a complex and ever-evolving ecosystem. In this context, a well-known key challenge is represented by alias resolution, i.e. the process of grouping under a unique identifier the addresses owned by the same network layer device. While several(More)
Traceroute is probably the most famous networking tool widely adopted in both industry and research. Despite its long life, however, measurements based on Traceroute are potentially inaccurate, misleading or incomplete due to several unresolved issues. In this paper, we face the limitation represented by hidden routers - devices that do not decrement the(More)
In this work, we propose a methodology based on the alias resolution process to demonstrate that the IP level view of the route provided by traceroute may be a poor representation of the real router-level route followed by the traffic. More precisely, we show how the traceroute output can lead one to (i) inaccurately reconstruct the route by overestimating(More)
In the last years, network measurements have shown a growing interest in active probing techniques. Recent works propose approaches based on the IP prespecified timestamp option and consider its support to be enough for their purposes. On the other hand, other works found that IP options are usually filtered, poorly implemented, or not widely supported. In(More)
Network operators measure Internet routes to trou-bleshoot problems, and researchers measure routes to characterize the Internet. However, they still rely on decades-old tools like traceroute, BGP route collectors, and Looking Glasses, all of which permit only a single query about Internet routes—what is the path from here to there? This limited interface(More)