Match each cloud service model to the primary management boundary provided by the cloud vendor.
- Infrastructure as a Service (IaaS)The provider supplies virtualized hardware, storage, and networking, while the customer installs and maintains the operating system and application software.
- Platform as a Service (PaaS)The provider maintains the operating system, database engine, and runtime environment, allowing developers to deploy custom application code without infrastructure management.
- Software as a Service (SaaS)The provider hosts and manages the entire application stack, delivering complete software functionality directly to end users over a web browser.
Answer
Infrastructure as a Service (IaaS) matches provider-managed virtualized hardware with customer-managed operating systems. Platform as a Service (PaaS) matches provider-managed operating systems and runtimes for developer code deployment. Software as a Service (SaaS) matches fully hosted end-user applications.
Each cloud service model defines a distinct boundary of customer versus vendor responsibility. IaaS supplies raw virtual hardware where the customer installs the OS. PaaS supplies managed runtimes and OS environments for code deployment. SaaS supplies complete application functionality delivered directly to end users.
Step-by-Step Solution
Key Concept
Cloud Service Model Boundaries (IaaS vs. PaaS vs. SaaS)