Lesson 1: How the Modern Web Works (DNS, HTTP, DOM)

Learn the foundational mechanisms of the web: how browsers request resources over HTTP/HTTPS, how DNS resolves domain names, and how the critical rendering path builds the DOM and CSSOM.

Key Takeaways

The browser rendering pipeline: HTML parsing -> DOM tree -> Render tree -> Layout -> Paint
HTTP request-response cycle and status codes (200, 301, 404, 500)
Modern DOM manipulation principles and performance considerations

Course Completion75%

3 of 4 lessons completed

Course Curriculum

Module 1: Modern Web Architecture & Foundations

Module 2: React Core Concepts & Component State

Instructor

Dr. Arjun Mehta

Lead Architect & Senior Lecturer

15+ years in full-stack architecture, open-source contributor, and mentor to over 50,000 engineers worldwide.