Certified Cloud Security Professional (CCSP)Cloud Concepts, Architecture and DesignMedium
A financial institution is migrating its on-premises data centers to a public cloud environment. They require strict isolation of their compute resources, dedicated network infrastructure, and complete control over the underlying hypervisor. Which cloud service model best meets these requirements?
- AFunction as a Service (FaaS)
- BInfrastructure as a Service (IaaS)
- CSoftware as a Service (SaaS)
- DPlatform as a Service (PaaS)
Show answer & explanationAnswer & explanation
Correct answer: B. Infrastructure as a Service (IaaS)
IaaS provides the highest level of control over computing resources, including virtual machines, networks, and storage, allowing the customer to manage operating systems and applications, thus meeting the strict isolation and control requirements.
Why the other options are wrong
- A. FaaS is a subset of serverless computing, where customers only manage code, not infrastructure.
- C. SaaS offers fully managed applications; customers have no control over infrastructure.
- D. PaaS provides a platform for developing and deploying applications, abstracting away the underlying infrastructure.
Infrastructure as a Service (IaaS)
A cloud service model where a provider offers virtualized computing resources over the internet, including virtual machines, storage, networks, and operating systems.
- Customers manage operating systems, applications, and data.
- High degree of control over the infrastructure.
- Provider manages the underlying physical infrastructure.
Memory trick: IaaS is like building your own house on rented land, PaaS is an apartment, and SaaS is a hotel room.