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TermsDescription
VNFVirtualised Network Function,  implementation of an NF that can be deployed on a Network Function Virtualisation Infrastructure (NFVI)
VNFDVirtualised Network Function Descriptor, configuration template that describes a VNF in terms of its deployment and operational behaviour, and is used in the process of VNF on-boarding and managing the lifecycle of a VNF instance
VNFMVirtualised Network Function Manager, functional block that is responsible for the lifecycle management of VNF
VDUVirtual Deployment Unit, construct that can be used in an information model, supporting the description of the deployment and operational behaviour of a subset of a VNF, or the entire VNF if it was not componentized in subsets 
VNFCVirtualised Network Function Component,  internal component of a VNF providing a VNF Provider a defined sub-set of that VNF's functionality, with the main characteristic that a single instance of this component maps 1:1 against a single Virtualisation Container
virtualisation containerpartition of a compute node that provides an isolated virtualised computation environment, e.g., virtual machine (VM)s
CPConnection Point
CPDConnection Point Descriptor, template that describes a CP in terms of its deployment and operational behaviour
DFDeployment Flavour, template that describes a specific deployment (of a Network Service or VNF) supporting specific KPIs (such as capacity and performance)
VNF indicatorVNF Indicators are information supplied by the VNF or the EM (declared in VNFD) to provide some indication on the VNF behaviour
VLVirtual Link, set of connection points along with the connectivity relationship between them and any associated target performance metrics (e.g. bandwidth, latency, QoS)
VLDVirtual Link Descriptor, template that describes a VL in terms of its deployment and operational behaviour
VIMVirtualised Infrastructure Manager, functional block that is responsible for controlling and managing the NFVI compute, storage and network resources, usually within one operator's Infrastructure Domain (e.g. NFVI-PoP)
NFVINetwork Functions Virtualisation Infrastructure, totality of all hardware and software components that build up the environment in which VNFs are deployed


2. SD: Service Descritor

TermsDescription

Df

Deployment Flavour

NF

Network Function

NS

Network Service

NSD

Network Service Descriptor

NST

Network Slice Template

NSST

Network Slice Subnet Template

NSI

Network Slice Instance

NSSI

Network Slice Subnet Instance

NSMF

Network Slice Management Function

NSSMF

Network Slice Subnet Management Function

KPI

Key Performance Indicator

SD

Service Descriptor

S- NSSAI

Single Network Slice Selection Assistance Information

Sap

Service Access Point

Vnffg

VNF Forwarding Graph