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How CDNs Really Work: Bringing Content Closer to Users Around the World
system design

Deep Dives

Comprehensive breakdowns of complex technical challenges.

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How Load Balancers Really Work: Scaling Applications Beyond a Single Server
system design
Jun 255 min read

How Load Balancers Really Work: Scaling Applications Beyond a Single Server

Load balancers are one of the most important components of modern application infrastructure. This article explores how they distribute traffic, improve availability, prevent server overload, and help applications scale efficiently. We examine load balancing algorithms, health checks, failover mechanisms, session persistence, and their role in modern cloud-native architectures.

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How HTTP Really Works: The Protocol That Powers the Web
system design
Jun 255 min read

How HTTP Really Works: The Protocol That Powers the Web

HTTP is the communication protocol that powers websites, APIs, cloud services, and modern web applications. In this article, we explore how HTTP was designed, how the request-response model works, the structure of requests and responses, why HTTP is stateless, and how cookies and sessions maintain user state. We also examine the evolution of HTTP from HTTP/1.0 to HTTP/3 and its critical role in modern cloud-native architectures.

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How the Internet Really Works: Understanding TCP/IP, Packets, and Network Communication
system design
Jun 254 min read

How the Internet Really Works: Understanding TCP/IP, Packets, and Network Communication

Every time you open a website or use an app, your data is broken into small packets and sent across multiple networks to reach its destination. TCP/IP helps devices find each other, route packets correctly, and ensure data arrives reliably even when packets are delayed, lost, or arrive out of order.

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