Knowledge base
In-depth, curated explanations — read one anytime.
9 guides across 2 categories
OSI Model
The complete OSI reference — every layer, its protocols, devices, headers, addressing, security, and how it maps to TCP/IP. One page, everything.
Updated 2026-06-17
TCP vs UDP
The two transport protocols compared in full — how each works, when to use which, headers, reliability, security, and where QUIC/HTTP-3 fits.
Updated 2026-06-17
TCP/IP Model
The 4-layer model the internet actually runs on — each layer, its protocols, how it maps to OSI, encapsulation, a real web request, and why it beat OSI.
Updated 2026-06-17
Start Here — How to Solve a Problem
Stuck and can't solve even one problem? This is the gentle, from-zero guide to how problem solving actually works — solve by hand first, then code. A ~22 minute read.
Updated 2026-06-17
From if/else to DSA — The Whole Path
The complete beginner journey, explained gently and in full — decisions, loops, functions, recursion, every data structure, and the core algorithms. Read it over several sittings.
Updated 2026-06-17
Problem Solving
How to actually solve programming problems — the process, every pattern and when to use it, complexity, data structures, worked examples, and how to get good.
Updated 2026-06-17
DSA Practice — Learn by Solving
A hands-on path through DSA: learn a pattern, solve real LeetCode problems with built-in Hint 1 / Hint 2 / Approach drop-downs, then the next pattern. A ~40 minute read + a lot of practice.
Updated 2026-06-17
C Programming
The full C lab notebook in one place — every classic program (Part A, B and C) with code, how it works, and sample output, plus a quick reference for I/O and operators.
Updated 2026-06-17
Python
Python from scratch — every fundamental explained clearly, building up to solving real problems, with links to the Problem Solving patterns and complexity.
Updated 2026-06-17
