You can also classify cloud computing models based on the services they offer. let’s study some of the popular models of cloud computing as a service.

infrastructure as a service (iaas): this cloud model delivers the infrastructure or computing hardware as an on-demand service. iaas providers operate and maintain datacenters with all the equipment. the providers pool together all the popular hardware and deliver them using virtual machines. individual users take advantage of this on a pay-as-you-go basis. users may use the hardware to install their choice of operating system and application software. iaas providers may also offer virtual local area networks, software bundles, firewalls, and storage space. microsoft azure and amazon web services are examples of iaas.