CompTIA A+ Core 1 (220-1201)Virtualization and Cloud ComputingEasy
A small business is evaluating cloud services. They are particularly interested in a service that allows them to rent virtual servers, storage, and networking components, but they want to retain full control over the operating system, middleware, and applications installed on those resources. Which cloud service model aligns with these requirements?
- AInfrastructure as a Service (IaaS)
- BPlatform as a Service (PaaS)
- CFunction as a Service (FaaS)
- DSoftware as a Service (SaaS)
Show answer & explanationAnswer & explanation
Correct answer: A. Infrastructure as a Service (IaaS)
Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet. Users get control over operating systems, applications, and middleware, while the cloud provider manages the underlying hardware, virtualization, and networking infrastructure.
Why the other options are wrong
- B. PaaS provides a development platform; users manage applications but not the OS or underlying infrastructure.
- C. FaaS executes small, event-driven code snippets; users have no control over the OS or traditional server management.
- D. SaaS provides ready-to-use applications; users have no control over the OS or platform.
Infrastructure as a Service (IaaS)
A cloud computing model that provides virtualized computing resources over the internet, including virtual machines, storage, and networking.
- Users provision and manage operating systems, applications, and middleware.
- Cloud provider manages the underlying infrastructure (hardware, virtualization).
- Offers the most control compared to PaaS and SaaS.
Memory trick: IaaS: You manage the OS, PaaS: You manage the app, SaaS: You just use the app.