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☁️ How Cloud Computing Works

Learn what the cloud means, how pooled resources scale, how IaaS, PaaS, and SaaS differ, and why data centers still matter.

7
lessons
~12 min
to learn
🤖 Technology
subject
Adults
level
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What you’ll learn

  1. The basic ideaExplain why cloud computing is a networked service backed by physical resources.Cloud computing is a way to access shared computing resources over a network; the cloud label hides, but does not erase, the underlying hardware.
  2. On-demand accessRecognize on-demand self-service and broad network access as cloud characteristics.Cloud services can be requested through interfaces and reached from different clients, but availability still depends on networks and operations.
  3. Pooling and elasticityExplain resource pooling and why elasticity is a controlled trade-off.Providers pool resources among customers and may add or release capacity as demand changes, within limits and designs.
  4. Measured serviceDistinguish measuring resource use from pricing, security, and governance.Cloud systems can meter storage, processing, bandwidth, or accounts, giving people evidence about use without answering every policy question.
  5. Service modelsCompare IaaS, PaaS, and SaaS by customer responsibility.The service models describe different boundaries between provider-managed infrastructure and customer-managed software, data, and accounts.
  6. Deployment choicesDistinguish public, private, and hybrid deployment vocabulary from access permissions.Deployment labels describe intended infrastructure use and connections; they do not alone prove that data is safe or public.
  7. Physical costsConnect cloud services to data-center energy and infrastructure costs.Cloud services run in physical data centers that consume energy and require efficiency work, so cloud is a design decision with material trade-offs.

Questions this course answers

Which description best matches cloud computing?

NIST defines cloud computing around network access, pooled configurable resources, and rapid provisioning with limited management effort.

Match each service model with the responsibility it usually leaves with the customer.

The models differ mainly in how much of the software and infrastructure stack the provider manages.

Order a simple cloud-service request.

This sequence keeps the remote service connected to both the user's request and the physical resources underneath.

Grounded in trusted sources

  • https://csrc.nist.gov/pubs/sp/800/145/final
  • https://nvlpubs.nist.gov/NISTPUBS/LEGACY/SP/NISTSPECIALPUBLICATION800-145.PDF
  • https://www.energy.gov/cmei/buildings/data-centers-and-servers
  • https://www.energy.gov/cmei/femp/energy-efficiency-data-centers

Every Wunder lesson is built from real, reputable sources — never invented.

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