While traffic classification techniques are improving in accuracy and efficiency, traffic classification remains an open problem in Internet research due to the continued proliferation of different Internet application behaviors, further aggravated by growing incentives to disguise some applications to avoid filtering or blocking. In the paper Issues and future directions in traffic classification we provide an overview of both the evolution of traffic classification techniques and constraints to their development, highlighting key differences across existing approaches and techniques. We propose different strategies and actions aimed at the persistently unsolved challenges in the field over the last decade. Although we directly measure the ITM elements that are routed via the GEANT network, our goal is not to accurately measure each entry of ITM, but to infer its statistical properties from the observable elements.
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Although recent years have seen a significant increase in the amount of media focus on the safety and efficiency of American air travel, little public attention has been directed at the nation's air traffic control system and its operators since an illegal strike staged by air traffic controllers in was followed by the termination of over 11, workers and the decertification of the Professional Air Traffic Controllers Organization PATCO. Despite the fact that air traffic controllers comprise a vital component of the nation's system of ensuring air safety, they are often overlooked, not only by the public, but also by the government agencies that are charged with overseeing, funding, and regulating air travel. Today, the extant air traffic control system is beleaguered with a number of problems, difficulties, and challenges that will be difficult for it to overcome in the foreseeable future without significant attention from both governmental agencies and private sector industries and organizations. In this paper, some of the most pressing concerns facing the nation's currently existing air traffic control will be examined, including:. In addition, the implications of these problems in relation to the future of air traffic control will be discussed.