Also known as NaaS.

Network as a Service is the software abstraction of the network component of computing. Incorporating concepts including software defined networking, programmable networking and API-based operation of WAN services, NaaS can be applied to multiple aspects of networking including transport, hybrid cloud, multi-cloud, Private Network Interconnect, and Internet Exchanges. NaaS offers advantages including consumption-based billing, on-demand resource access, and greater flexibility to meet changing requirements.