Infrastructure as a Service
/ˈaɪ-æs/
n. “Rent the machines, run your own rules.”
IaaS, short for Infrastructure as a Service, is a cloud computing model that provides virtualized computing resources over the internet. Rather than purchasing and maintaining physical servers, storage, and networking hardware, organizations can provision these resources on demand from a provider. This gives unprecedented flexibility, allowing users to scale up or down based on workload requirements without the traditional capital expenditures of a data center.