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Measurement of the performance of a computer network using active measurement techniques is gaining popularity. This paper seeks to evaluate a set of active measurement tools and provide a statistical reference in order to determine the accuracy of the tools. The focus on using statistical methods to evaluate the time series data enhances the credibility, as compared to visually comparing raw time...
Traffic replay tools that generate traffic in order to recreate real traffic scenarios play an important role in network operation. Nowadays, the Internet backbone links are increasing in capacity as well as in transmission speed making trace-based replay difficult. This paper proposes a novel approach to high-speed backbone traffic replaying. We bring out an original granular split of traffic that...
At a switching node in an optical packet switching (OPS) network, packet contention occurs whenever two or more packets try to reach the same output port of the node at the same wavelength, consequently it degrades network performance. Previous works on optical packet switching flourishingly adopted optical buffering with optical fibre delay line (FDL), wavelength conversion, or deflection routing...
This paper is mainly concerned with end to-end performance from the viewpoint of measurements using active probes. Since probes are merely trains of packets, packet-level modelling and simulation may intuitively appear to be the best solution. However, given the poor scalability of packet-level simulation, modelling of end-to-end paths at the scale defined by NGN is unfeasible. This spawns the problem...
Web services have become an indispensable part of the Internet and the world. We have learned their applicability in every aspects of human life which lead to the huge amount of Web traffic exchanged over the Internet everyday. This excessive popularity is also the cause that led to some troubles. Among them, Flash crowds and Denial of Service (DoS) attacks are the two major concerns for the stability...
This paper introduces a new scheme, called ABshoot, for measuring end-to-end available bandwidth. In ABshoot, we first use an unevenly spaced probe stream, which is statistically constructed based on the knowledge of end-to-end capacity, to quickly identify the turning point within the stream. Then we use evenly spaced probe streams with the probing rates close to the turning point to thoroughly explore...
Recently, the concern about network management and network security has inspired many research topics, among which, research on detecting and identifying anomalies has attracted a lot of interest. In this paper, we propose an anomaly identification method based on traffic flow analysis. The result of the research proves that by assembling some features of traffic flows and calculating some specific...
Requirements for a measurement platform nowadays have advanced to the level at which a number of different in principle measurement techniques have to be performed simultaneously. Quite common are hybrids of passive data collections and event-driven active measurements. This calls for a highly extensible measurement platform, in which design of the probe and parameters of probing could be accessible...
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