As consumers and businesses increase their demands for internet data, the Data Center Interconnect (DCI) market is growing rapidly. Cloud computing, video downloads, and demands from mobility devices are testing the capacity limits of even the largest of data networks. An important partner in this system are Internet Exchanges (IXs). Most Internet Exchanges are headquartered outside of North America, and they are often created as nonprofit corporations. IXs also help to control costs, always an important factor for the end user.
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http://www.datacenterknowledge.com/archives/2014/07/16/data-center-interconnect-market-role