AZ-900 - Describe Cloud Concepts - Section 1.1

Describe cloud computing including the shared responsibility model, cloud models, and the consumption-based model.

Define cloud computing and distinguish public, private, and hybrid cloud models, explaining who bears responsibility for each layer under the shared responsibility model. Recognise how the consumption-based model replaces upfront capital expenditure (CapEx) with operational expenditure (OpEx), and why that shift matters for budgeting.

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