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Home | Seminars and Symposia | Past seminars/symposia: Wednesday, November 12, 2003

DTC Seminar Series

New Research Challenge: How to Design for Resiliency


Lixia Zhang
Computer Science

Wednesday, November 12, 2003
2:30 pm

402 Walter Library

Lixia ZhangDownload slides (pdf 1.72 MB) Today's Internet is facing unprecedented challenges in providing dependable data delivery services. The large scale Internet infrastructure is built upon a collection of highly heterogeneous technologies; the Internet operational community consists of a large number of competing service providers with varying levels of technical skills and diverse operational practices and the Internet user population crosses all walks of life pursuing diverse and sometimes conflicting interests. As a result, faults have become the norm rather than the exception. In addition to physical component failures, there have been increasing numbers of human operational errors, network-wide infections by software worms, as well as malicious attacks directed against the Internet infrastructure. Furthermore, due to its highly coupled structure, faults in one part of the Internet often bring about unexpected consequences to the rest of the system. How can we build a resilient Internet that can effectively defend itself against anticipated as well as unexpected faults and attacks? In this talk I'll share with you our response to this question. We argue that the Internet's large change in size calls for a fundamental change in network and protocol design considerations. (joint work with Songwu Lu, Dan Massey, and Andreas Terzis)


Lixia Zhang is a professor in computer science department at UCLA. She received her Ph.D. Degree in computer science from MIT. Prior to joining UCLA in 1995 she was a member of research staff at Xerox PARC. In the past she has served on the Internet Architecture Board, Co-Chair of IEEE Communication Society Internet Technical Committee, and Vice-Chair of the ACM SIGCOMM. Her past work includes Adaptive Web Caching (one of the first overlay network designs), support for differentiated services, and Internet Distance Map Service (IDMAPs). Her more recent work includes extremely large-scale sensor networking and fault tolerance in large-scale networks.