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BEGINNER • Foundations

System Architecture Fundamentals

A comprehensive, first-principles exploration of how clients and servers exchange data, handle concurrency, and maintain stability under production traffic.

3 hours
2 modules
3 articles
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Module & Article Index

MODULE 1

Client-Server Architecture

Examine the primary communication architecture of the modern web, from transport protocols to application listeners.

2 articles
1.1

Introduction to Client-Server Architecture

Deconstructing the fundamental communication paradigm that powers the modern internet.

1.2

Request Lifecycle & Transport Protocols

Tracing a network packet from socket allocation to application dispatch and transport acknowledgment.

MODULE 2

Network Fundamentals

How domain names are resolved into IP addresses, and how operating system sockets facilitate packet exchange.

1 article
2.1

DNS: How Domain Names Find Servers

Understanding hierarchical DNS tree resolution, recursive resolvers, root servers, and TTL caching.

Core Architectural Focus

  • ✓ Understand the separation of concerns between client agents and server processes
  • ✓ Trace requests across transport layers, network sockets, and application runtimes
  • ✓ Analyze bottlenecks in connection pooling, socket limits, and concurrency models
  • ✓ Reason about trade-offs between stateful sessions and stateless horizontal scaling

Prerequisites

  • • Familiarity with basic programming concepts
  • • Basic awareness of what an IP address and port represent