How Much Can the Internet Be Greened?

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Executive Summary

The energy consumption of the Internet is becoming more and more a key issue, and several projects are studying how to reduce its energy consumption. In this paper, the authors provide a first evaluation of the amount of redundant resources (nodes and links) that can be powered off from a network topology to reduce power consumption. They first formulate a theoretical evaluation that exploits random graph theory to estimate the fraction of devices that can be removed from the topology still guaranteeing connectivity. Then, they compare theoretical results with simulation results using realistic Internet topologies.

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