Infrastructure as a Service (IaaS) provides virtualized computing infrastructure over the internet. In this model:
The cloud provider supplies the hardware (servers, storage, networking).
The client (your organization) is responsible for installing and managing the OS, applications, and all configurations.
This aligns with the question, where the organization must take full responsibility for maintenance.
Incorrect Options:
A. PaaS offers managed OS, middleware, and runtime, reducing customer responsibilities.
B. SaaS provides fully managed applications—users only access features.
C. Functions as a Service (FaaS) offers event-driven computing without server management, used in serverless environments.
Reference – CEH v13 Official Courseware:
Module 19: Cloud Computing
Section: “Cloud Service Models”
Table: “Responsibilities in IaaS vs PaaS vs SaaS”
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