IaaS, PaaS, SaaS
The five cloud characteristics according to NIST, the three service models, how responsibilities are split layer by layer between customer and provider, and pay-as-you-go billing.
- 27 cards
- 6 topics
- Free
The outline, topic by topic
Each topic is weighted the way the exam weighs it.
- Concepts
- Questions
- Sort and link
- The numbers
- Scenarios
- Understand
A few cards from the deck
Cloud computing: what is it?
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Network access, on demand, to a shared pool of configurable computing resources (servers, storage, applications), obtained and released in minutes.
NIST defines it by five characteristics: on-demand self-service, broad network access, resource pooling, rapid elasticity and measured service.
A customer creates a virtual machine from a console in a few minutes, without contacting the provider. Which NIST characteristic is at work?
- On-demand self-service
- Rapid elasticity
- Measured service
- Resource pooling
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On-demand self-service
Self-service means getting resources with no human intervention from the provider. Elasticity concerns adjusting to load, measured service concerns billing.
NIST's five characteristics are on-demand self-service, broad network access, resource …, rapid elasticity and ….
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NIST's five characteristics are on-demand self-service, broad network access, resource pooling, rapid elasticity and measured service.
Pooling means several customers share the same hardware, isolated from one another; measured service makes consumption visible, hence billable.
IaaS: what is it?
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A model where the provider rents raw infrastructure (virtual machines, storage, network) and the customer installs and runs the operating system and everything above it.
It is the most flexible model and the one that leaves the most work to the customer: operating system patches, middleware, runtime, data and application.