IaaS — Infrastructure-as-a-Service

What is Infrastructure as a Service (IaaS)?

Infrastructure as a Service (IaaS) is a service model that delivers computer infrastructure on an outsourced, rental basis to support “virtual data center” operations. Typically, IaaS provides hardware, storage, servers and data center space or network components; it may also include software.

An IaaS provider provides policy-based services and is responsible for housing, operating and maintaining the infrastructure equipment it provides for a client. Clients usually pay on a per-use or utility computing basis.

Characteristics of IaaS include:

  • Automated administrative tasks
  • Dynamic scaling
  • Platform virtualization
  • GUI and API-based access
  • Internet connectivity

IaaS is also described as one of three main categories of cloud computing service. The other two are software as a service (SaaS) and platform as a service (PaaS).