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Black-box analysis of Internet P2P applications

机译:Internet P2P应用程序的黑匣子分析

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摘要

After P2P file-sharing and VoIP telephony applications, VoD and live-streaming P2P applications have finally gained a large Internet audience as well. In this work, we define a framework for the comparison of these applications, based on the measurement and analysis of the traffic they generate. In order for the framework to be descriptive for all P2P applications, we first define a minimum set of observables of interest: such features either pertain to different layers of the protocol stack (from network up to the application), or convey cross-layer information (such as the degree of awareness, at overlay layer, of properties characterizing the underlying physical network). The framework is compact (as it allows to represent all the above information at once), general (as is can be extended to consider features different from the one reported in this work), and flexible in both space and time (as it allows different levels of spatial aggregation, and also to represent the temporal evolution of the quantities of interest). Using the minimum feature set, we analyze some of the most popular P2P application nowadays, highlighting their main similarities and differences. We then apply the framework, using also different features and metrics, to two interesting case study: namely, the detection of malfunctioning or misbehaving peers, and a fine-grained analysis of P2P network-awareness and friendliness.
机译:在P2P文件共享和VoIP电话应用程序之后,VoD和实时流式P2P应用程序也终于获得了很大的Internet受众。在这项工作中,我们基于对它们产生的流量的测量和分析,定义了一个用于比较这些应用程序的框架。为了使该框架能够描述所有P2P应用程序,我们首先定义了一组最少的可观察对象:这些功能涉及协议栈的不同层(从网络到应用程序),或者传达跨层信息(例如,在覆盖层上对表征基础物理网络的属性的了解程度)。该框架结构紧凑(因为它可以一次代表所有上述信息),通用(可以扩展以考虑与本工作中报告的特征不同的特征),并且在空间和时间上都灵活(因为它允许不同的特征)。空间聚集的水平,也代表感兴趣量的时间演变)。使用最小功能集,我们分析了当今一些最流行的P2P应用程序,突出了它们的主要异同。然后,我们还将框架(还使用不同的功能和指标)应用于两个有趣的案例研究:即,检测到故障或行为不正常的对等点,以及对P2P网络意识和友好度的细粒度分析。

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