The Fundamentals: Domain Name System

Wed, 21 Jan 2026 00:00:00 +0000

Building a DNS server from scratch is a rite of passage for network engineers. It forces you to leave the comfort of text-based protocols like HTTP and JSON and dive into the world of bits, bytes, and packed binary structures.

This project is a Go implementation of a DNS server. We will implement the core of the Domain Name System protocol as defined in RFC 1035, handling everything from parsing raw UDP packets to constructing compliant responses.

The Fundamentals: Hypertext Transfer Protocol

Tue, 20 Jan 2026 00:00:00 +0000

Building an HTTP server from scratch is one of those enlightening “wizard” moments in a developer’s journey. It demystifies the magic behind fetch('google.com') and turns the abstract concept of “The Web” into concrete bytes and sockets.

This project, HTTP from TCP, is a Python implementation of a concurrent HTTP/1.1 server. It implements the core of the HTTP/1.1 protocol (RFC 9112) directly on top of TCP, handling everything from parsing raw bytes to managing concurrent connections and chunked transfer encoding.

The Fundamentals on Blaž Škufca

The Fundamentals: Domain Name System

The Fundamentals: Hypertext Transfer Protocol