Network as a service (NaaS), a category of cloud services where the capability provided to the cloud service user is to use network/transport connectivity services and/or inter-cloud network connectivity services.NaaS involves the optimization of resource allocations by considering network and computing resources as a unified whole.
Traditional NaaS services include flexible and extended VPN, and bandwidth on demand. NaaS concept materialization also includes the provision of a virtual network service by the owners of the network infrastructure to a third party (VNP – VNO).
The term “Network as a service” (NaaS) is considered to be part of the nomenclature of cloud computing, along with infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS).
Most Common NaaS Service Models
- Naas Service Model varies depending on the network enabler, the network user, and the service provided. Most common models are VPN, BoD services, and Mobile Virtualized Networks such as MVNOs:
- Virtual Private Network (VPN): Extends a private network and the resources contained in the network across public networks like the Internet. It enables a host computer to send and receive data across shared or public networks as if it were a private network with all the functionality, policies of the private network.
- Bandwidth on Demand (BoD): Technique by which traffic bandwidth in an IT or Telecom network is assigned based on requirements between different nodes or users. Under this model link bandwidth is dynamically adapted to the instantaneous traffic demands of the nodes connected to the link
- Mobile Network Virtualization: Model consisting in a Telecom infrastructure manufacturer or independent network enabler that builds and operates a telecom network (wireless, or transport connectivity) and sells its communication access capabilities to third parties (commonly mobile operators) charging by capacity utilization.Most common implementation of Mobile Virtual Network is the Mobile Virtual Network Operator (MVNO), in which a mobile communications services provider does not own the radio spectrum or wireless network infrastructure over which the MVNO provides services to its customers. Commonly a MVNO offers its communication services using the network infrastructure of an established mobile network operator.