CompTIA Network+ (N10-009)Networking ConceptsMedium
A company wants to rent virtualized servers, storage, and networking infrastructure from a cloud provider, while retaining full control over the operating systems and installed applications. Which cloud service model best fits this requirement?
- APaaS
- BIaaS
- CDaaS
- DSaaS
Show answer & explanationAnswer & explanation
Correct answer: B. IaaS
Infrastructure as a Service (IaaS) provides virtualized compute, storage, and networking resources while leaving the customer responsible for managing the OS, middleware, and applications, unlike SaaS or PaaS which abstract more of the stack.
Why the other options are wrong
- A. PaaS provides a platform for developing applications but abstracts away the underlying OS management.
- C. DaaS delivers virtual desktops, not raw infrastructure control.
- D. SaaS delivers fully managed applications, with no OS or infrastructure control for the customer.
IaaS (Infrastructure as a Service)
IaaS provides virtualized computing infrastructure such as servers, storage, and networking, while the customer manages the operating system and applications.
- Customer manages OS, middleware, and apps
- Provider manages physical hardware and virtualization
- Examples: AWS EC2, Azure VMs
Memory trick: IaaS hands you the bare metal cloud stack to build on.