A Sketchpad Journey into Cloud Computing
Video 1 — Let's sketch out the fundamentals! ✏️
The US Department of Defense created ARPANET — the very first network connecting computers across universities. The goal? Share research & survive communication failures.
TCP/IP protocols were invented, giving every device a common language to communicate. Email was born. Networks started linking together globally.
Tim Berners-Lee created HTML, HTTP & URLs. The browser made the internet accessible to everyone. Boom — the dot-com era! 🚀
Social media, smartphones, streaming — the internet became everywhere. Companies needed massive scale → enter Cloud Computing.
From Your Laptop → Internet → Server
You = person writing a letter 💌
Your ISP = the local post office that picks up your letter 🏤
The Internet backbone = the postal sorting network (trucks, planes, hubs)
🚚✈️
The Server = the recipient who reads your letter and sends a reply back
📬
Just like a letter travels through sorting centers, your data travels through routers and switches until it reaches the right server!
A server is just a computer — like yours — but optimized to serve data to other computers 24/7.
• Screen, keyboard, speakers
• Designed for one user
• Turns off when you close it
• Runs apps you use
• No screen needed
• Designed for many users
• Runs 24/7/365
• Serves websites, APIs, data
Imagine thousands of servers stacked in one building!
| Your Laptop Has… | A Data Center Has… |
|---|---|
| 💾 1 CPU (processor) | 💾 Thousands of CPUs |
| 🧠 8–16 GB RAM | 🧠 Petabytes of RAM |
| 📦 256GB–1TB Storage | 📦 Exabytes of storage |
| 🔌 1 power cable | 🔌 Massive power systems + backup generators |
| ❄️ Internal fan | ❄️ Industrial cooling systems |
| 🔒 Laptop lock maybe? | 🔒 Biometric security, guards, cameras |
• Manual server provisioning
• Hardware ordered & racked by hand
• Long-term contracts (3–5 years)
• You pay upfront, even for idle resources
• Weeks to deploy new servers
• You manage everything
• Automated & self-service
• Spin up servers in seconds via API
• Pay-as-you-go pricing 💰
• Pay only for what you use
• Deploy globally in minutes 🌍
• Provider manages the infrastructure
Beyond just servers — it's a whole new way to build!
Who's responsible for what?
Different levels of abstraction — like ordering food!
The cloud keeps evolving — new "as a Service" offerings are everywhere!
We'll be learning cloud through Amazon Web Services (AWS) — the world's most popular cloud platform!
Market Share
Regions globally
Services available
Our upcoming learning roadmap!
See you in the next video! ☁️🚀
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