Cloud Computing
Delivery of computing services — servers, storage, databases, networking, software — over the internet on demand.
Cloud computing is the delivery of computing services — servers, storage, databases, networking, software, and analytics — over the internet through a provider’s globally distributed datacenters. Microsoft Azure is one such provider, offering over 200 products and services on demand without customers owning physical hardware. The AZ-900 exam contrasts cloud with traditional on-premises infrastructure, where a business owns, operates, and maintains its own servers; cloud shifts much of that responsibility to the provider. This underpins the shared-responsibility model and explains why capital expenditure (CapEx) becomes operational expenditure (OpEx) in the cloud.
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