While this momentum is encouraging, a closer look un­der the hood reveals a less rosy picture: NFV products and prototypes tend to be merely virtualized software implemen­tations of products that were previously offered as dedicated hardware appliances.
this native API provides support for: zero-copy packet transfer over vports for high throughput communication between E2D and NFs, and rich message ab­stractions which allow NFs to go beyond traditional packetbased communication.