CS Colloquium Series @ UCY
Department of Computer Science - University of Cyprus
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Colloquium Coordinator: Demetris Zeinalipour
Colloquium: Census and Survey of the Visible Internet, Prof. Christos Papadopoulos (Colorado State University, USA), Tuesday, December 22st, 2009, 11:30-12:30 EET.
The Department of Computer Science at the University of Cyprus cordially invites you to the Colloquium entitled:
Census and Survey of the Visible Internet
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Speaker: Prof. Christos Papadopoulos |
Abstract:
Many Internet topology studies have appeared in the literature.
However, such studies have for the most part, ignored the population of
hosts. While many hosts are hidden behind firewalls and NATs, there is
much to be learned from examining the population of "visible" Internet
hosts -- one can better understand network growth and accessibility to
help assess vulnerabilities, deployment of new technologies and improve
network models.
This paper is to our knowledge the first attempt to measure the
population of visible Internet edge hosts. We measure hosts in two ways:
via periodic Internet censuses, where we query all accessible Internet
addresses every few months, and via surveys of a small fraction of the
responsive address space, probing each address every 11 minutes for
one week. These approaches are complementary: a census is effective at
evaluating the Internet as a whole, while surveys validate the census
and allow observation of the lifetime of typical address occupancy.
Our findings include trends in address occupancy, an upper bound on the
number of servers and an analysis of firewalled addresses and firewall
block size.
Joint work with John Heidemann, Yuri Pryadkin, Ramesh Govindan and
Joseph Bannister.
Short Bio:
Christos Papadopoulos is currently an associate professor at Colorado
State University. He received his Ph.D. in Computer Science in 1999
from Washington University in St. Louis, MO. His interests include
network security, router services, multimedia protocols and reliable
multicast. His current work includes signal processing techniques for
network attack detection and participation in the PREDICT program to
collect network traces for security research.
Sponsor: The CS Colloquium Series is supported by a generous donation from  |