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Understanding AWS VPCs

Let’s break down VPCs using a metaphor.

Ben Scheer
4 min readDec 30, 2024

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If you’ve ever felt overwhelmed trying to understand AWS Virtual Private Clouds (VPCs) and their components like subnets, route tables, and NACLs, you’re not alone. Actually, networking concepts can seem abstract and confusing at first.

But what if we simplified it using something we all understand — a neighborhood? Let’s take a stroll through our imaginary AWS VPC neighborhood and break it all down.

Read on to dive in!

The VPC: Your Neighborhood

The Virtual Private Cloud (VPC) is like the boundary of your private neighborhood. It defines the area where your houses (resources like servers and databases) are built. Only people with permission can enter this neighborhood. As the owner, you get to decide how everything is organized and secured inside it.

Subnets: Streets in the Neighborhood

A subnet represents a street or a block within the neighborhood.

  • Public Subnet: These are streets with open access, where delivery trucks and visitors can freely come and go. Public-facing services like web servers often live here.
  • Private Subnet: These are gated streets with restricted access. Sensitive…

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Ben Scheer
Ben Scheer

Written by Ben Scheer

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