VPC Fundamentals
The architectural backbone of the cloud: Understanding how traffic flows through isolated networks.
The Core Ingredients
The essential components required to build a functional Virtual Private Cloud.
Subnets
IP address ranges within your VPC. Divide your network into Public (internet-facing) and Private (isolated) segments.
Route Tables
The traffic controllers. A set of rules (routes) that determine where network traffic from your subnet is directed.
Internet Gateway
The VPC’s front door. A horizontally scaled, redundant component that allows communication between your VPC and the internet.
Security Groups
Virtual firewalls for your instances. They control inbound and outbound traffic at the resource level (stateful).
The Traffic Flow Process
Visualizing how a Public Subnet connects to the world via Route Tables and Gateways.
The Internet Gateway is created and attached to your specific VPC.
A route is added to the table: 0.0.0.0/0 (all traffic) points to the IGW.
The Route Table is associated with a subnet, making it “Public”.