CompTIA A+ Core 1 (220-1201)Virtualization and Cloud ComputingEasy
A small architecture firm wants to reduce IT overhead by purchasing computing resources from a provider that also serves many other unrelated companies over the internet. The firm has no visibility into or control over the physical hardware, and it can quickly scale services up or down. Which cloud deployment model is this firm using?
- APrivate cloud
- BPublic cloud
- CCommunity cloud
- DHybrid cloud
Show answer & explanationAnswer & explanation
Correct answer: B. Public cloud
A public cloud is owned and operated by a third-party provider that offers shared infrastructure to multiple unrelated organizations over the internet, with the customer having no control over the underlying hardware. This matches the firm's lack of hardware visibility and pay-as-you-go scalability.
Why the other options are wrong
- A. Private cloud is dedicated to a single organization, giving that organization control over the hardware.
- C. Community cloud is shared only among organizations with common interests, such as several hospitals.
- D. Hybrid cloud combines private and public clouds, but the firm here is only described as using a single shared external provider.
Public Cloud
A cloud deployment model where infrastructure and services are owned by a third-party provider and shared among multiple unrelated customers over the internet.
- Multi-tenant environment shared by many customers
- Customer has no control over underlying physical hardware
- Typically billed on a pay-as-you-go or subscription basis
Memory trick: Public cloud = 'Public pool' shared by everyone, no lifeguard control.