Sandeep Sarat

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We present the initial results from our evaluation study on the performance implications of anycast in DNS, using four anycast servers deployed at top-level DNS zones. Our results show that 15% to 55% of the queries sent to an anycast group, are answered by the topologically closest server and at least 10% of the queries experience an additional delay in(More)
Traditionally, operating systems have used monolithic network stack implementations: implementations where the whole network stack executes in the kernel or (in microkernels) in a single, trusted, user level server. Code maintenance issues, ease of debugging, need for simultaneous existence of multiple protocols, and security benefit have argued for(More)
Router queues buffer packets during congestion epochs. A recent result by Appenzeller et al. showed that the size of FIFO queues can be reduced considerably without sacrificing utilization. While Appenzeller showed that link utilization is not affected, the impact of this reduction on other aspects of queue management such as fairness, is unclear. Recently,(More)
Mobility can be exploited to spread malware among wireless nodes. In this paper, we present an analytical model for estimating the evolution of infections spanning multiple network domains that host mobile nodes. We validate the accuracy of the proposed model by comparing its predictions to simulations driven by realistic mobility patterns. Our results show(More)
Increasing size of surface models has lead to a great deal of research in progressive multi-resolution representation of these models. Network streaming visualization of large models is particularly interesting. Quite a few existing techniques use a point based rendering system. This approach accelerates rendering but suffers from a degradation in the image(More)
While the Internet has revolutionalized the communication landscape, it continues to be plagued by issues of robustness and security that threaten the network’s operation. In this dissertation, we employ a multi-faceted approach to tackle these issues. Specifically, measurement studies are performed to experimentally quantify the ground truth related to the(More)
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