Network Operations and Internet Security @ UChicago

Marshini Chetty Presents Paper on Broadband Performance in South Africa

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Marshini Chetty presented our paper “Measuring Broadband Performance in South Africa” to the 4th ACM Symposium on Computing for Development (DEV).  The paper includes several new and important findings, including:

  • Fixed and mobile throughput does not achieve the rates advertised by ISPs (in contrast to countries such as the US, where performance more closely matches advertised rates).
  • Mobile throughput is consistently higher than fixed-line (e.g., DSL) throughput, although both throughput and latency are considerable more variable on mobile providers.
  • Latency to other destinations on the African continent can be quite high, due to Internet routes that “detour” through Internet exchange points (IXPs) in Europe (e.g., Amsterdam Internet exchange, London Internet exchange).

We are now in the process of repeating this study in other African countries, in collaboration with Research ICT Africa and Google.
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Author: Nick Feamster

Nick Feamster is a professor in the Department of Computer Science at Princeton University. Before joining the faculty at Princeton, he was a professor in the School of Computer Science at Georgia Tech. He received his Ph.D. in Computer science from MIT in 2005, and his S.B. and M.Eng. degrees in Electrical Engineering and Computer Science from MIT in 2000 and 2001, respectively. His research focuses on many aspects of computer networking and networked systems, including the design, measurement, and analysis of network routing protocols, network operations and security, and anonymous communication systems. In December 2008, he received the Presidential Early Career Award for Scientists and Engineers (PECASE) for his contributions to cybersecurity, notably spam filtering. His honors include the Technology Review 35 "Top Young Innovators Under 35" award, a Sloan Research Fellowship, the NSF CAREER award, the IBM Faculty Fellowship, and award papers at SIGCOMM 2006 (network-level behavior of spammers), the NSDI 2005 conference (fault detection in router configuration), Usenix Security 2002 (circumventing web censorship using Infranet), and Usenix Security 2001 (web cookie analysis).

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