Master AWS Cloud Computing From Scratch

Clear, interactive, and structured AWS lessons designed for absolute beginners.

Route Tables

A route table contains routes that determine where network traffic from a subnet is directed.

Why it matters

Without appropriate routes, resources may not reach the destinations they need.

How it works

Destination CIDR → target such as local, internet gateway or NAT gateway → associate route table with subnet.

Real-world example: A public subnet commonly has a route to an Internet Gateway.

Core Concept

Routes map destination ranges to targets such as local routing, an internet gateway or NAT gateway.

A subnet is associated with a route table that determines its routing behavior.

VPCPublic SubnetLoad BalancerInternet Gateway routePrivate SubnetApp / DatabaseNo direct inbound internet

What you should remember

Key idea

Routes map destination ranges to targets such as local routing, an internet gateway or NAT gateway.

Key idea

A subnet is associated with a route table that determines its routing behavior.

Real-world example

Use a realistic cloud workload and focus on the responsibility of this AWS service.

User → AWS service → application → data / response

Choose the service that matches the responsibility instead of forcing every workload into one resource.

# Conceptual workflow aws-service --resource example # Verify configuration → test → monitor → clean up
Practice tip: Build the smallest possible lab, verify the result, then remove resources you no longer need.

Quick Test

1 Question

What is the main idea of this AWS lesson?