Infrastructure as a service (IaaS) refers to online services that abstract the user from the details of infrastructure like physical computing resources, location, data partitioning, scaling, security, backup etc. Means computing infrastructure, virtual machines and other resources as resources to subscribers.
The term “infrastructure as a service (IaaS)” is considered to be part of the nomenclature of cloud computing, along with software as a service (SaaS), platform as a service (PaaS), desktop as a service (DaaS), managed software as a service (MSaaS), mobile back-end as a service (MBaaS), and information technology management as a service (ITMaaS).