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Cloud Computing 101

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What exactly is “The Cloud”?

In simple terms, cloud computing is the delivery of computing services—including servers, storage, databases, networking, software, and analytics—over the Internet (“the cloud”).

Instead of buying and maintaining physical servers in your office, you “rent” power and space from providers like Amazon (AWS), Microsoft (Azure), or Google (GCP).

“The cloud is just someone else’s computer, but on a massive, professional, and globally distributed scale.”

Key Characteristics

✓ On-demand self-service: Get resources when you need them.
✓ Broad network access: Access from anywhere with an internet connection.
✓ Resource pooling: Multiple users share the same physical hardware.
✓ Rapid elasticity: Scale up or down instantly.

The Service Models (IaaS, PaaS, SaaS)

Think of it like choosing how to get a pizza.

Infrastructure

IaaS

The raw materials. You rent the servers and storage, but you manage the operating system and apps.

Example: AWS EC2, Azure VMs

Platform

PaaS

The framework. You focus on coding your app; the provider handles the servers, OS, and scaling.

Example: Google App Engine, Heroku

Software

SaaS

The finished product. You just use the software via a web browser. No installation needed.

Example: Gmail, Netflix, Slack

Ready for a Career in the Cloud?

Put your new knowledge to work. Search for cloud engineer, architect, and developer roles in your area.

Test Your Knowledge

Quick check-in to see what you’ve learned.

1. If you use Netflix to watch a movie, which cloud service model are you using?

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Learn Cloud Computing & Find Your Next Job | Cloud Academy

Cloud Computing 101

What exactly is “The Cloud”?

Key Characteristics

The Service Models (IaaS, PaaS, SaaS)

IaaS

PaaS

SaaS

Ready for a Career in the Cloud?

Test Your Knowledge

1. If you use Netflix to watch a movie, which cloud service model are you using?

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