Cloud Infrastructure Services, also known as Infrastructure as a Service (IaaS), is a cloud computing model that provides virtualized computing resources over the internet. It provides users with access to a shared pool of configurable computing resources such as servers, storage, networks, and software. IaaS is a pay-as-you-go service, allowing users to scale up or down their resources as needed. It is a cost-effective way to access the latest technology without having to invest in hardware or software.