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Load Balancers & Proxies Explained for System Design

In this video, we break down Load Balancers and Proxies, two critical components used in modern distributed systems and scalable architectures. When applications start receiving thousands or even millions of requests, a single server is not enough. This is where load balancing and proxy servers come into play. They help distribute traffic efficiently, improve reliability, and prevent system failures. In this System Design Series, we explain how Load Balancers distribute traffic across servers and how Reverse Proxies and Forward Proxies manage and secure network communication. You will also learn the most commonly used load balancing algorithms, including: • Round Robin • Least Connections • Weighted Load Balancing • IP Hashing We also explain the difference between: • Reverse Proxy vs Forward Proxy • How Nginx, HAProxy, and Envoy work in real-world architectures • Why large-scale systems use CDNs, Load Balancers, Proxies, Caches, and Databases together By the end of this video, you will clearly understand how modern systems handle massive traffic, ensure high availability, and maintain low latency. This video is part of the System Design Series, where we explain complex backend architecture concepts in a simple and practical way.