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A Measurement Study On The Impact Of Routing Events On End-To-End Internet Path Performance, Feng Wang, Zhuoqing Morley Mao, Jia Wang, Lixin Gao, Randy Bush
A Measurement Study On The Impact Of Routing Events On End-To-End Internet Path Performance, Feng Wang, Zhuoqing Morley Mao, Jia Wang, Lixin Gao, Randy Bush
Electrical and Computer Engineering Faculty Publication Series
Extensive measurement studies have shown that end-to-end Internet path performance degradation is correlated with routing dynamics. However, the root cause of the correlation between routing dynamics and such performance degradation is poorly understood. In particular, how do routing changes result in degraded end-to-end path performance in the first place? How do factors such as topological properties, routing policies, and iBGP configurations affect the extent to which such routing events can cause performance degradation? Answers to these questions are critical for improving network performance.In this paper, we conduct extensive measurement that involves both controlled routing updates through two tier-1 ISPs and …
Adaptive Defense Against Various Network Attacks, Cliff C. Zou, Nick Duffield, Don Towsley, Weibo Gong
Adaptive Defense Against Various Network Attacks, Cliff C. Zou, Nick Duffield, Don Towsley, Weibo Gong
Electrical and Computer Engineering Faculty Publication Series
In defending against various network attacks, such as distributed denial-of-service (DDoS) attacks or worm attacks, a defense system needs to deal with various network conditions and dynamically changing attacks. Therefore, a good defense system needs to have a built-in "adaptive defense" functionality based on cost minimization-adaptively adjusting its configurations according to the network condition and attack severity in order to minimize the combined cost introduced by false positives (misidentify normal traffic as attack) and false negatives (misidentify attack traffic as normal) at any time. In this way, the adaptive defense system can generate fewer false alarms in normal situations or …
An End-User-Responsive Sensor Network Architecture For Hazardous Weather Detection, Prediction And Response, Jim Kurose, Eric Lyons, David Mclaughlin, David Pepyne, Brenda Philips, David Westbrook, Michael Zink
An End-User-Responsive Sensor Network Architecture For Hazardous Weather Detection, Prediction And Response, Jim Kurose, Eric Lyons, David Mclaughlin, David Pepyne, Brenda Philips, David Westbrook, Michael Zink
Electrical and Computer Engineering Faculty Publication Series
We present an architecture for a class of systems that perform distributed, collaborative, adaptive sensing (DCAS) of the atmosphere. Since the goal of these DCAS systems is to sense the atmosphere when and where the user needs are greatest, end-users naturally play the central role in determining how system resources (sensor targeting, computation, communication) are deployed. We describe the meteorological command and control components that lie at the heart of our testbed DCAS system, and provide timing measurements of component execution times. We then present a utility-based framework that determines how multiple end-user preferences are combined with policy considerations into …