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What You Will Learn
Beginner
- What cloud computing actually is
- Why it exists and what problem it solves
- The shipping container analogy for cloud
Before cloud, companies bought servers, kept them in a room, and paid people to maintain them. If traffic spiked, the server crashed. If traffic was low, the server sat idle. Cloud computing solved this by renting computing power on demand — pay for what you use, scale when you need.
Definition
Cloud computing is the delivery of computing services — servers, storage, databases, networking, software — over the internet ("the cloud"), with pay-as-you-go pricing.The Electricity Analogy
Before the electric grid, factories built their own power plants. Then the grid came: plug in, pay for what you use, scale up or down instantly. Cloud computing is the electric grid for computing power.
Why Cloud Exists
- No upfront cost: No buying servers for $50k
- Pay per use: Pay for 1 hour or 10 years
- Instant scaling: 1 server or 10,000 in minutes
- Global reach: Deploy in Tokyo, Frankfurt, Sao Paulo
- No maintenance: Provider handles hardware, power, cooling
Cloud vs On-Premises
| On-Premises | Cloud |
|---|---|
| Buy servers upfront | Pay per use |
| Weeks to provision | Minutes |
| Fixed capacity | Elastic |
| You maintain hardware | Provider maintains |
| High upfront cost | Low upfront |
Practical Exercise
Go to aws.amazon.com and create a free account
Browse the AWS Console
Search for "EC2" and "S3" — you will use these throughout the course
Key Takeaways
- Cloud = computing services delivered over the internet, pay-as-you-go.
- No upfront server costs. Scale up or down in minutes.
- Provider handles hardware; you focus on your app.
- Like electricity: plug in, pay for what you use.
Previously: Nothing — this is the first lesson.
Today: You learned: The simplest explanation of cloud computing.
Next: Lesson 02 covers IaaS, PaaS, and SaaS.
Today: You learned: The simplest explanation of cloud computing.
Next: Lesson 02 covers IaaS, PaaS, and SaaS.
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