Master AWS Cloud Computing From Scratch

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

Application Load Balancer

An Application Load Balancer works at the application layer and supports HTTP/HTTPS routing features such as host- and path-based routing.

Why it matters

It is useful for modern web applications and APIs that need application-aware routing.

How it works

Listener → rules → target group → healthy target.

Real-world example: Route /employees to one target group and /reports to another.

Core Concept

ALB supports listener rules and path/host-based routing.

Example: /api traffic can route to an API target group while /app traffic routes to a frontend target group.

ClientsLoad BalancerListener + RulesHealth ChecksTarget 1Target 2

What you should remember

Key idea

ALB supports listener rules and path/host-based routing.

Key idea

Example: /api traffic can route to an API target group while /app traffic routes to a frontend target group.

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?