State three service models offered by cloud computing.

Infrastructure as a Service (IaaS): This is the most basic category of cloud computing services. With IaaS, you rent IT infrastructure such as servers, virtual machines, storage, networks, and operating systems on a pay-as-you-go basis.

Platform as a Service (PaaS): This is a cloud computing model that provides a platform and environment to allow developers to build applications and services over the internet. PaaS services are hosted in the cloud and accessed by users simply via their web browser.

Software as a Service (SaaS): In this service model, cloud providers host and manage the software application and underlying infrastructure, and handle any maintenance, like software upgrades and security patching. Users connect to the application over the Internet, usually with a web browser on their phone, tablet, or PC.