Software-defined networking (SDN) was born of frustration. Computer science researchers wanted to test new networking ideas on real, live production networks, but they faced obstacles. Not only were the production networks on their college campuses typically off-limits, but the commercial switches and routers comprising those networks were proprietary and closed. The computer scientists couldn't program the networks even if they were allowed to.
Source: http://www.infoworld.com/t/networking/software-defined-networking-206740?source=rss_networking
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