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Cisco announced the results of the Cisco® Visual Networking Index (VNI) Forecast and Methodology, 2008-2013 that confirms consumer broadband usage and global IP network traffic continues to climb at an overwhelming pace due to new forms and expanded usage of interactive media, and the explosion of video content across multiple devices. The study projects that global IP traffic will increase fivefold by 2013. There are key consumer and service provider implications to the forecast that compares regions around the globe including North America, Western Europe, AsiaPac, Middle East and more.

Global IP traffic is expected to increase fivefold from 2008 to 2013, approaching 56 exabytes per month in 2013, up from approximately 9 exabytes per month in 2008.

By 2013, annual global IP traffic will reach two-thirds of a zettabyte (or 667 exabytes). (A zettabyte is a trillion gigabytes.)

Source: http://newsroom.cisco.com/dlls/2009/prod_060909.html