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Network virtualisation has many benefits. It explains why network operators and vendors have invested so much in advancing this category of technology.
The primary benefit is the flexibility that virtualised networks allow. Unlike physical networks, it’s relatively fast and easy to change the configuration, topology, function and usage of virtual networks. Physical network changes tend to require human intervention, often with long planning cycles. By contrast, virtual networks can be changed almost instantaneously, not to mention being modifiable using algorithmic / automated techniques. This allows the networks to be optimised for usage patterns and performance targets in near real time.