Cloud Computing 101: Understanding the Basics

Are you curious about cloud computing? Do you want to know what it is, how it works, and why it matters? If so, you're in the right place! In this article, we'll take a deep dive into the world of cloud computing and explore its fundamentals.

What is Cloud Computing?

Let's start with the basics. Cloud computing is the delivery of computing services over the internet. These services include servers, storage, databases, networking, software, analytics, and more. Instead of owning and maintaining physical infrastructure, businesses can rent these services from cloud providers like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP).

Why is Cloud Computing Important?

Cloud computing has revolutionized the way businesses operate. It has enabled companies of all sizes to access powerful computing resources without the need for significant upfront investment. With cloud computing, businesses can scale up or down their computing resources as needed, pay only for what they use, and focus on their core competencies instead of managing IT infrastructure.

Types of Cloud Computing

There are three main types of cloud computing:

  1. Infrastructure as a Service (IaaS): This is the most basic type of cloud computing. It provides virtualized computing resources, such as servers, storage, and networking, over the internet. Customers can use these resources to build their own applications and services. Examples of IaaS providers include AWS EC2, Microsoft Azure Virtual Machines, and Google Compute Engine.

  2. Platform as a Service (PaaS): This type of cloud computing provides a platform for customers to develop, run, and manage their applications without the need for infrastructure management. PaaS providers offer pre-built tools and services, such as databases, middleware, and development frameworks, to help customers build and deploy their applications. Examples of PaaS providers include AWS Elastic Beanstalk, Microsoft Azure App Service, and Google App Engine.

  3. Software as a Service (SaaS): This is the most advanced type of cloud computing. It provides complete applications over the internet, such as email, collaboration, and customer relationship management (CRM) software. Customers can use these applications without the need for installation or maintenance. Examples of SaaS providers include Salesforce, Google Workspace, and Microsoft Office 365.

How Does Cloud Computing Work?

Now that we know what cloud computing is and why it's important, let's explore how it works.

Cloud Architecture

Cloud computing is built on a distributed architecture that spans multiple data centers around the world. Each data center contains thousands of servers, storage devices, and networking equipment that work together to provide computing services to customers.


One of the key technologies that enables cloud computing is virtualization. Virtualization allows multiple virtual machines (VMs) to run on a single physical server. Each VM is isolated from the others and has its own operating system, applications, and data. This allows cloud providers to maximize the use of their physical infrastructure and provide flexible computing resources to customers.

Cloud Services

Cloud providers offer a wide range of services to customers, including:

Cloud Deployment Models

There are three main deployment models for cloud computing:

  1. Public Cloud: This is the most common deployment model. Public cloud providers offer computing services to anyone over the internet. Customers can rent these services on a pay-as-you-go basis and scale up or down as needed.

  2. Private Cloud: This deployment model is used by organizations that want to maintain control over their computing resources. Private cloud providers offer computing services to a single organization and are typically hosted on-premises or in a colocation facility.

  3. Hybrid Cloud: This deployment model combines public and private cloud services. Organizations can use public cloud services for non-sensitive workloads and private cloud services for sensitive workloads that require more control and security.


Cloud computing is a game-changer for businesses of all sizes. It provides flexible, scalable, and cost-effective computing resources that enable organizations to focus on their core competencies and innovate faster. In this article, we've explored the basics of cloud computing, including what it is, how it works, and why it matters. We've also looked at the different types of cloud computing, cloud architecture, virtualization, cloud services, and cloud deployment models. If you're interested in learning more about cloud computing, be sure to check out our deep dive courses on!

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