Introduction to AWS and Cloud Computing

Before diving into Amazon Web Services (AWS), let’s build a foundation by understanding why cloud computing exists, how it differs from traditional systems, and what concepts like VPS, VCS, and networking mean.

This section ensures that you grasp the “why” before the “how”.

What Is Cloud Computing?

Cloud Computing is the on-demand delivery of computing resources — like servers, storage, databases, and networking — over the internet with pay-as-you-go pricing.

In short, instead of buying and maintaining physical hardware, you rent computing power from cloud providers such as AWS, Google Cloud, or Microsoft Azure.

Key Characteristics

• On-demand: Access resources instantly when needed.
• Scalable: Increase or decrease capacity automatically.
• Cost-efficient: Pay only for what you use.
• Globally available: Deploy apps in multiple regions worldwide.
• Reliable: Data replicated across data centers for uptime.

Traditional IT vs Cloud Computing