This document from Cisco VNI Global Forecast 2011-2016 contains predictions about global internet traffic growth between 2011 and 2016. It predicts that total global internet traffic will grow rapidly from 1 zettabyte in 2011 to 3.3 zettabytes per year in 2016. It also predicts that internet traffic will continue shifting from access networks to metro and core networks as more content and services move to centralized cloud platforms.
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