— 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)
Smart cities and smart mobility represent two of the most significative real use case scenarios in which there is an increasing demand for collecting, elaborating, and storing large amounts of heteroge-nous data. In urban and mobility scenarios issues like data trustiness and data and network security are of paramount importance when considering smart… (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)
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)
Round Trip Time (RTT): time to send a data packet and receive its response • Often used to infer the status of the network or of a network path (e.g. through ping) • For deriving application performance, for detecting anomalies, etc.
—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)
—The dependence of the industry on cloud-based infrastructures has grown much faster than our understanding of the performance limits and dynamics of these environments. An aspect only marginally analyzed in the past is related to the performance of the intra-cloud network connecting the virtual machines (VMs) deployed in the same data center. The few… (More)