An enterprise IT department is migrating several internal operations to the cloud. Match each corporate project requirement on the left with the most appropriate cloud service model on the right.
- Migrating a legacy application that requires custom OS kernel configurations and direct control over virtual networkingInfrastructure as a Service (IaaS)
- Deploying a novel web app where developers only manage source code while the vendor manages the OS, web server, and runtimePlatform as a Service (PaaS)
- Replacing an on-premises email platform with a fully vendor-managed, web-accessible communication toolSoftware as a Service (SaaS)
Answer
Migrating a legacy app requiring custom OS kernels maps to Infrastructure as a Service (IaaS). Deploying custom code onto a vendor-managed environment maps to Platform as a Service (PaaS). Replacing an email platform with a fully vendor-managed web application maps to Software as a Service (SaaS).
IaaS matches the legacy application scenario because full OS kernel access and network configuration require control over virtual computing infrastructure. PaaS matches the developer application scenario because the provider delivers the operating system and web hosting environment, leaving only code maintenance to the customer. SaaS matches the web-based email replacement scenario because the provider manages the entire software solution from physical servers up to the end-user application interface.
Step-by-Step Solution
Key Concept
Cloud Service Models (IaaS, PaaS, SaaS)