Public Cloud
Cloud services offered over the public internet and shared across many organizations (tenants).
A public cloud is a computing environment owned and operated by a third-party provider — Microsoft in Azure’s case — and delivered over the public internet to multiple organizations. Each customer’s workloads are logically isolated through virtualization and identity boundaries, even though the underlying physical hardware is shared. This multi-tenancy lets Microsoft spread costs across many customers, enabling pay-as-you-go pricing. The key exam distinction is between public, private, and hybrid cloud: public requires no capital expenditure on hardware and no data center to manage, but customers cannot exclusively own the servers, which drives some regulated industries toward private or hybrid deployments.
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