Many service providers feel that the benefits of network functions virtualization outweigh the risks. With traditional hardware-based networks, network managers have to purchase dedicated hardware devices and manually configure and connect them to build a network. This is time-consuming and requires specialized networking expertise.
NFV allows virtual network function to run on a standard generic server, controlled by a hypervisor, which is far less expensive than purchasing proprietary hardware devices. Network configuration and management is much simpler with a virtualized network. Best of all, network functionality can be changed or added on demand because the network runs on virtual machines that are easily provisioned and managed.