Network Service – a capability that facilitates amodel of the network. Some examples are
As defined by Network Functions Virtualization (NFV) ETSI Industry Specification Group (ISG) in the Network Functions Virtualisation (NFV); Terminology for Main Concepts in NFV, a network service is a composition of network functions and defined by its functional and behavioral specification.
NOTE: The network service contributes to the behavior of the higher layer service, which is characterized by at least performance, dependability, and security specifications. The end-to-end network service behavior is the result of the combination of the individual network function behaviors as well as the behaviors of the network infrastructure composition mechanism.