CompTIA Project+ (PK0-005)Basics of IT and GovernanceMedium
A project involves migrating an on-premise application to a public cloud environment. The project manager needs to assess the most cost-effective way to host the application while maintaining control over the operating system and installed software. Which cloud service model would best fit these requirements?
- APlatform as a Service (PaaS)
- BInfrastructure as a Service (IaaS)
- CSoftware as a Service (SaaS)
- DFunction as a Service (FaaS)
Show answer & explanationAnswer & explanation
Correct answer: B. Infrastructure as a Service (IaaS)
IaaS provides virtualized computing resources over the internet, giving users control over operating systems and installed applications, similar to on-premise, but with the scalability and cost-efficiency of the cloud.
Why the other options are wrong
- A. PaaS provides a platform for development and deployment, abstracting away the OS and underlying infrastructure, thus reducing control.
- C. SaaS delivers fully managed applications over the internet, offering no control over the underlying infrastructure or OS.
- D. FaaS (serverless computing) is an event-driven execution model where the cloud provider manages all infrastructure, offering even less control than PaaS.
Infrastructure as a Service (IaaS)
IaaS is a cloud computing service model where a provider offers virtualized computing resources over the internet, including virtual machines, storage, and networks.
- Users manage operating systems, applications, and data.
- Provider manages virtualization, servers, storage, and networking.
- Offers high flexibility and control, similar to on-premise but with cloud benefits.
Memory trick: IaaS: Infrastructure, I Control Everything Above the Hardware.