What is Infrastructure as a Service (IaaS)?

IaaS forms the foundational layer of cloud-based computing, allowing users to build virtualized IT platforms that scale easily.

Infrastructure as a Service (IaaS) definition

"Infrastructure as a Service" refers to centrally managed hardware made available to users for rapid provisioning in a virtualized environment. The infrastructure includes compute resources, cloud storage, and networking capability. Users access these resources via a browser-based management console or by API. IaaS services automatically scale to meet demand, and customers pay only for the resources that they use.

IaaS may be hosted on your own infrastructure as a private cloud, on a third party’s dedicated infrastructure as a managed private cloud, or on a third party’s large-scale shared infrastructure as a public cloud.