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End-to-End Internet Packet Dynamics Vern Paxson

Summary: End-to-End Internet Packet Dynamics
Vern Paxson
Network Research Group
Lawrence Berkeley National Laboratory
University of California, Berkeley
We discuss findings from a large-scale study of Internet packet dynamics
conducted by tracing 20,000 TCP bulk transfers between 35 Internet sites.
Because we traced each 100 Kbyte transfer at both the sender and the re-
ceiver, the measurements allow us to distinguish between the end-to-end
behaviors due to the different directions of the Internet paths, which often
exhibit asymmetries. We characterize the prevalence of unusual network
events such as out-of-order delivery and packet corruption; discuss a robust
receiver-based algorithm for estimating "bottleneck bandwidth" that ad-
dresses deficiencies discovered in techniques based on "packet pair"; inves-
tigate patterns of packet loss, finding that loss events are not well-modeled
as independent and, furthermore, that the distribution of the duration of loss
events exhibits infinite variance; and analyze variations in packet transit de-
lays as indicators of congestion periods, finding that congestion periods also


Source: Akella, Aditya - Department of Computer Sciences, University of Wisconsin at Madison


Collections: Computer Technologies and Information Sciences