Infrastructure NFV is divided into three domains [15]:
Computer domain - the domain of computer role is to provide computing and storage resources and when used in conjunction with the hypervisor. It provides an interface to a domain network infrastructure, but does not connect to the network itself.
Hypervisor domain - the domain role is to mediate computational resources domain software running on virtual machines. Hypervisors have been developed for the needs of cloud solutions, and attach importance to the allocation of the available hardware simply can achieve a high level of portability of virtual machines. The hypervisor can emulate (imitate) each type of hardware platform and even in some cases, completely emulate the instruction set so that the virtual machine considers that runs on a completely different processor architectures than the real one.
Domain network infrastructure - its role:
create a channel of communication between multiple VNFC (virtualized network functions components) distributed VNF (virtualized network functions)
create a channel of communication between multiple VNF
create a communication channel between VNF and MANO
create a channel of communication between components NFVI and their orchestration and management
provide a means of remote control VNFC
provide a means of linking with the existing network operator