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Cloud Computing Fundamentals – A Layman’s Guide

Imagine you need to store clothes. You could buy a cupboard for your home (expensive upfront, space-consuming) or rent a locker in a safe facility (pay only for the space you use, and expand anytime). Cloud computing works in a similar way – instead of buying and maintaining your own computer servers, you rent computing power, storage, and software from companies who run massive, secure data centers.

Alternatively, you can look at Cloud Computing as a 4-wheeler vehicle, which has specific characteristic like engine, doors, windshield, wheels as fundamental concept and you also need to learn driving to drive a car. So Cloud Computing is like knowing the basics of car. Then you have the car rental companies from where you rent different types of cars based on your requirement. These rental companies have different types of cars like compact sedans, SUVs, MUVs. As end user, if I must rent a car, I use these rental companies to rent based on my requirement. So, in case of Cloud Computing, AWS, GCP, AZURE are like the car providers and these cloud providers provide different resources (Compute servers, databases, software, networks, storage etc) that is used by developers to build applications. These are achieved by vast network of global data centers which these cloud providers have.

In simple terms: Cloud computing means using the internet to access computing resources – like storage, applications, or databases – that are physically located somewhere else, maintained by cloud providers.

Public Cloud vs Private Cloud:

  • Public Cloud: Shared resources, like renting a flat in a large apartment building. Cost-effective, scalable, and maintained by providers. Examples: AWS, Google Cloud (GCP), Microsoft Azure.
  • Private Cloud: Dedicated resources for one organization, like owning your own villa. More control, more security, but higher cost and maintenance.

Where Do AWS, GCP, and Azure Fit In?

Think of them as the 'big three' public cloud landlords who rent out computing resources:

  • AWS (Amazon Web Services): The market leader with the widest range of services.
  • GCP (Google Cloud Platform): Strong in analytics, AI, and integration with Google tools.
  • Microsoft Azure: Popular with businesses using Microsoft products (Windows, Office, etc.).

Real-Life Examples of Cloud Use:

  • Movies are streamed from AWS servers instead of your device.
  • Transactions processed in secure cloud data centers.
  • Google Photos stores images in GCP so you can access them anywhere.
  • Microsoft Teams runs on Azure to connect employees globally.

Why Businesses Use the Cloud

  • Pay only for what you use: Like an electricity bill.
  • Access from anywhere, anytime.
  • Scale up or down instantly: Based on demand.
  • No need to worry about physical server maintenance.

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