Infrastructure as a Service (IaaS):
- The entire computing interface and computing environment or the entire infrastructure is being provided by the vendor as a service.
- The computing environment may include the storage facilities, database sync and back up facilities or it may be a complete operating environment powered by an operating system.
- As the other two services, here also the duty of hosting and monitoring of the entire infrastructure is carried by the vendor. The customers need not to worry about any glitches or responsibility of smooth functioning of the services. It is well taken care by the vendor itself.