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Programmable network access (PNA) refers to accessing network resources, sending network commands and other network communication on a programmed or software defined or controlled network environment.
It refers to all physical and virtual devices that access or operate on a network on which routing and switching decisions are made or controlled by programs rather than network hardware.
PNA primarily relies and works in a network environment that is designed, developed and managed in a software defined networking (SDN) framework. PNA is typically performed within cloud computing and virtual networking environments where virtual machines and virtual switches interact with each other on a virtual network layer. The virtual network layer operates as an abstract virtual network on top of a physical network and provides data communication within that virtual network.
In PNA, each packet can be prioritized, centrally managed and all network access and communication can be programmed independent of the physical networking equipment.