The cloud service model that focuses on providing infrastructure over the internet is known as Infrastructure as a Service (IaaS). IaaS allows businesses to access virtualized computing resources such as servers, storage, and networking without the need for physical hardware. This model provides scalability, flexibility, and cost-effectiveness, as organizations can pay for only what they use. IaaS enables businesses to quickly deploy and manage their applications while reducing the burden of maintenance and management of physical hardware. Overall, IaaS empowers organizations to innovate rapidly by offering robust infrastructure solutions tailored to their needs.