Telecommunication service providers have constructed some of the largest and most complicated networks currently in existence. Now, they are facing a severe problem as revenues are incrementally increasing and network equipment costs are growing exponentially (Figure 4.1). For these service providers, their interest in software-defined networking (SDN) is all about economics.
The cost of sophisticated networking equipment continues to increase as vendors add more and more functionality to their boxes. Unacceptably high network equipment ...