What is a Load Balancer? | L4 vs L7 Explained + NGINX, HAProxy, AWS

Load balancers are a core part of modern DevOps and cloud architecture, but many beginners struggle to understand how they actually work.

In this video, I explain Load Balancers from scratch, starting from the basics and gradually moving to real-world tools used in production systems.

This is Part 1, where we focus on concepts and comparisons. In the next video, we will implement everything with a real demo.

📚 What You Will Learn

• What is a Load Balancer
• Why load balancers are required in real-world systems
• How traffic is distributed across multiple servers
• Difference between L4 Load Balancer vs L7 Load Balancer
• Comparison of popular tools:
  - NGINX Load Balancer
  - HAProxy
  - AWS Load Balancer
• When to use which type of load balancer

🛠 Tools Covered

NGINX
HAProxy
AWS Load Balancer

🚀 Coming in Part 2

In the next video, we will build a real load balancing system:

• Multiple FastAPI apps using Docker
• NGINX as a Load Balancer
• Load testing with multiple requests
• Sticky sessions
• Real-time traffic distribution

🎯 Who This Video Is For

• DevOps beginners
• Backend developers
• Students learning system design
• Anyone preparing for DevOps / Cloud interviews

🔔 About the Channel – Discover Newton

This channel is focused on:

DevOps Concepts
Docker
NGINX
Kubernetes
Cloud Architecture
Real-world Projects

#devops
#loadbalancer
#nginx
#haproxy
#aws
#cloudcomputing
#networking
#systemdesign
#backenddevelopment
#learndevops
#devopsforbeginners
#nginxtutorial
#awsarchitecture
#docker
#devopsprojects

Видео What is a Load Balancer? | L4 vs L7 Explained + NGINX, HAProxy, AWS канала Discover Newton