Answer» Currently,lists as below: - Infrastructure as a Service (IaaS) – Virtual or physical hardware resources (e.g. compute, storage, network) offered as a service. IaaS is provided using a shared, multi-tenant IT infrastructure through on-demand services. IaaS ENABLES the end-user to provision servers, storage, networks, and other fundamental computing resources. End-users are able to deploy and RUN software, which can include operating systems and applications, on cloud-based servers. The end-user does not manage or control the UNDERLYING cloud infrastructure but has control over operating systems, data, deployed applications.
- Platform as a Service (PaaS) – delivers a computing platform or solution stack as a service, most often providing a complete development platform for organisations requiring a development instance of an application.
- Software as a Service (SaaS) – a hosted application accessed through a web browser. SaaS alleviates the maintenance and technical operation and support of business and consumer software. Management or control the underlying cloud infrastructure including network, servers, operating systems, storage, application management is PART of cloud SaaS provider. SaaS is offered with a subscription instead of traditional software license. The Pictorial representation is shown below:
|