Objective 1.3Networking Concepts· 1 min read

Cloud Computing Concepts

Cloud concepts and connectivity options

What you will learn

Distinguish IaaS, PaaS, and SaaS by what the customer manages versus the provider.
Explain the difference between public, private, and hybrid cloud.
Recall common cloud connectivity options (VPN, dedicated connection).
Pick the right model for a given scenario instead of just memorizing definitions.

All three cloud service models sell essentially the same thing — compute resources you don't physically own — but they differ in where the provider's job ends and yours begins. Picture a ladder: IaaS gives you just the virtual hardware, PaaS gives you a ready runtime, SaaS gives you the finished application.

Who manages what

	IaaS	SaaS
Operating system	Fully managed by the customer	The customer never sees it
Application	Customer installs and manages it	Ready-made, fully managed by the provider
Example	A virtual machine on AWS/Azure	A ready-made cloud email service

Cloud deployment models

Public Cloud	Resources shared among multiple customers on an external provider's infrastructure.
Private Cloud	Cloud infrastructure dedicated to a single organization, in-house or hosted.
Hybrid Cloud	A combination of private and public infrastructure, with workloads moving between them as needed.

What matters on the exam

PaaS is the most confused one — a ready development environment (no OS to manage, but no finished app either).
"We want full server control without buying hardware" = always IaaS.

Quick check

Answer in your head first, then reveal.

In which model does the customer fully control the OS?Reveal the answer
IaaS.
Which deployment model combines private and public?Reveal the answer
Hybrid cloud.
In SaaS, who manages the application?Reveal the answer
The service provider, fully.

Your next step

Read the lesson, then mark it complete

Practise this topic

Sources

Used to verify the facts. The writing is original to Passuit.