CompTIA A+ 220-1101 Core 1 - Chapter 21 - Cloud Computing Concepts

Sep 20, 2026

Covers A+ 220-1101 exam objective 4.1 with an introduction to cloud computing and virtualization. Defines cloud computing as on-demand services extending computer or network capabilities, requiring connectivity, and compares common cloud benefits and trade-offs such as reduced costs versus administrative control and security concerns. Explains common cloud models including SaaS, IaaS, and PaaS, detailing how each model delivers applications, infrastructure, or platforms and typical examples.

LanguageEnglish

CategoryExam

FormatPDF

Pages8

Reading Time20 min

AccessFree to download

Chapter 21: Cloud Computing Concepts

Introduction to Cloud Computing

Common Cloud Models

Software as a Service (SaaS)

Infrastructure as a Service (IaaS)

Platform as a Service (PaaS)

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FAQs

What is cloud computing and what is required to access cloud services?

Cloud computing is a way of offering on-demand services that extend a person’s computer or an organization’s network. Access requires some type of network connection to connect to the “cloud” and gain real-time access.

What benefits and drawbacks are associated with cloud-based services?

Cloud-based services can reduce costs, reduce administration and maintenance, increase reliability and scalability, and possibly improve performance. The drawbacks include losing administrative control and having security concerns.

How do SaaS, IaaS, and PaaS differ in what they provide?

SaaS delivers applications provided by a third party over the Internet, typically accessed via a web browser. IaaS provides networking, storage, load balancing, routing, and VM hosting, with the provider hosting the underlying infrastructure. PaaS provides tools and environments for developing and testing applications, often using IaaS as the underlying infrastructure.

Sep 20, 2026

Uploaded by Ben Jamin