In addition to knowing the essential features of a flexible network, a network designer should also follow a methodology that guides the entire lifecycle of the design process. In this regard, Cisco developed the PPDIOO methodology. PPDIOO is a succession of phases that every network implementation will experience during its operational lifetime.
From a business perspective, one common goal of the PPDIOO lifecycle and SONA is lowering the TCO. This can be achieved in the early phases of the process, in which technology requirements are evaluated and validated, and changes in the infrastructure and requirements for resources are properly planned . . .
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