A user is presented with the underlying hardware and software needed to develop and offer applications via Internet from a cloud service provider. Which cloud model is this user consuming? 

Answer options:

A. Software as a Service
B. Infrastructure as a Service
C. Platform as a Service
D. Applications as a Service.

B

In an IaaS model, a third-party provider hosts hardware, software, servers, storage and other infrastructure components on behalf of its users. IaaS providers also host users` applications and handle tasks including system maintenance, backup and resiliency planning. Reference: http://searchcloudcomputing.techtarget.com/definition/Infrastructure-as-a-Service-IaaS