Page 675 - Cloud computing: From paradigm to operation
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XaaS 3
3.2.4 physical network function: A network function implemented via a tightly coupled software and
hardware system.
NOTE – Examples of physical network functions include physical network switches and physical routers.
3.2.5 virtualized network function: A network function that can be deployed as a software on a NaaS
cloud service provider infrastructure.
NOTE – Examples of virtualized network functions include virtual switches and virtual routers.
4 Abbreviations and acronyms
This Recommendation uses the following abbreviations and acronyms:
API Application Programming Interface
BSS Business Support System
CCRA Cloud Computing Reference Architecture
CCS Cloud Compute and Storage
CDN Content Delivery Network
CSC Cloud Service Customer
CSN Cloud Service Partner
CSP Cloud Service Provider
DevOps Development and Operation
DNS Domain Name System
EMS Element Management System
ID Identifier
IMS IP Multimedia SubsystemIP Internet Protocol
IT Information Technology
KPI Key Performance Indicator
L2 Layer 2
L3 Layer 3
MPLS Multiprotocol Label Switching
NaaS Network as a Service
NC Network Connectivity
NF Network Function
NFV Network Functions Virtualization
NFVI Network Functions Virtualization Infrastructure
NMS Network Management System
NS Network Service
OSS Operation Support System
OTN Optical Transport Network
PNF Physical Network Function
PoP Points of Presence
QoE Quality of Experience
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