Definition of terms

Infrastructure as a Service (IaaS)
These are cloud-hosted, virtualised IT resources that are usually invoiced on a "pay as you go" basis. Users have full control over IT resources, but have to install and configure the required middleware and applications themselves.
Infrastructure as a Service (IaaS)
These are cloud-hosted, virtualised IT resources that are usually invoiced on a "pay as you go" basis. Users have full control over IT resources, but have to install and configure the required middleware and applications themselves.