Networks in C - From Sockets to a Multiplexed Chat Server

Do you already know the basics of C and want to apply your knowledge in a real scenario?
In this course, you will learn how real network applications work — by building one from scratch.

This is a hands-on, step-by-step guide where you will create a fully functional multiplexed chat server using modern C network programming techniques. No prior networking or Linux experience is required; everything is explained clearly from the beginning.

You will understand how sockets work internally, how TCP connections are created, how messages travel across the network, and how to manage multiple clients at the same time using the poll() system call.
We will also cover message buffering, connection handling, disconnection detection, reading partial data, and building a safe, stable, and fully functional server.

In addition, you'll gain practical experience and develop a clear perspective on real network behavior, analyzing message flow, and understanding how servers manage client state. These skills are essential for anyone advancing into professional software development.

By the end of the course, you will not only know how to write network code in C — you will understand how network systems behave at a low level, giving you a strong foundation for systems programming, security, network engineering, or any performance-critical field.