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Data Science and Complex NetworksReal Case Studies with Python$
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Guido Caldarelli and Alessandro Chessa

Print publication date: 2016

Print ISBN-13: 9780199639601

Published to Oxford Scholarship Online: December 2016

DOI: 10.1093/acprof:oso/9780199639601.001.0001

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The Internet Network

The Internet Network

(p.45) 3 The Internet Network
Data Science and Complex Networks

Guido Caldarelli

Alessandro Chessa

Oxford University Press

The Internet is the physical layer of PCs, computers, servers, connected by cables, a web of physical links, which allows the exchange of information produced and stored by the users. This is a network initially built with the notion of redundancy of the connections, as a way to resist to possible war attacks. Conceived by the military it has evolved into a public communication facility and its structure has grown with no or only limited planning. (As a result, no complete map of the Internet is available and some probe function is necessary to determine parts of the structure.) The CAIDA datasets used in this chapter are obtained using a troubleshooting application (Traceroute) which traces the path data takes from one computer to another. The main network centrality measures are introduced here in order to characterise a portion of the network: degree, closeness, betweenness, and eigenvector centrality. Finally, the robustness of this Internet portion is assessed.

Keywords:   Internet, CAIDA, closeness centrality, betweenness centrality, eigenvector centrality

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