- EMS : responsible for the functional management of the VNFs
- VIM : responsible for hardware resources and virtualized resources
- BSS : operates in tandem with OSS to improve overall customer experiance
Explanation: Virtual Network Function (VNF) is a software version of a network function that runs on the hypervisor as a VM.
Virtualized Infrastructure Manager (VIM) is responsible for controlling NFVI hardware resources and virtualized resources.
Element Managers (EMs) are responsible for the functional management of the VMs.
NFV orchestrator is responsible for creating, maintaining and tearing down VNF services.
Business Support System (BSS) works in tandem with OSS (platform typically operated by service providers) to improve overall customer experience.