IT-FPX4525 introduces cloud computing's foundational service models — IaaS, PaaS, SaaS — and the deployment considerations organizations weigh when deciding how to move workloads to the cloud.
Cloud service models: IaaS, PaaS, SaaS
IT-FPX4525 covers the distinctions between infrastructure, platform, and software as a service models, examining what responsibility each model shifts to the cloud provider versus the customer.
Cloud deployment models and decision factors
The course covers public, private, and hybrid cloud deployment models, examining the genuine trade-offs organizations weigh when choosing among them.
Key topics in IT-FPX4525
- IaaS, PaaS, and SaaS service model distinctions
- Shared responsibility between cloud provider and customer
- Public, private, and hybrid cloud deployment models
- Cost and control trade-offs across deployment models
- Common cloud migration considerations
- Basic cloud service provider comparison
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Worked example: the shared responsibility model
- IaaS: The cloud provider manages physical hardware; the customer manages the operating system, applications, and data security
- SaaS: The cloud provider manages nearly everything; the customer is primarily responsible for their own data and access management
- Lesson: Understanding exactly where the provider's responsibility ends and the customer's begins is essential; assuming the provider handles everything can leave critical security gaps unaddressed
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Frequently asked questions
Each cloud service model shifts a different portion of security and management responsibility to the provider versus the customer — in IaaS, the customer retains responsibility for OS-level and application security, while in SaaS, the provider handles nearly everything except the customer's own data and access management — and a customer who mistakenly assumes the provider handles security responsibilities that actually remain the customer's own can leave critical gaps completely unaddressed. IT-FPX4525 emphasizes this shared responsibility model because a genuine misunderstanding of where provider responsibility ends and customer responsibility begins is a common and serious source of cloud security incidents.
A hybrid approach allows an organization to keep certain workloads — particularly those with strict regulatory, security, or performance requirements — on private infrastructure they fully control, while taking advantage of public cloud's cost efficiency and scalability for other, less sensitive or more variable workloads. IT-FPX4525 covers hybrid deployment as a genuine middle-ground option because many real organizational situations don't fit cleanly into an all-public or all-private choice, and understanding when a hybrid approach makes sense is an important practical cloud strategy skill.