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Developer FoundationsBeginnerFree

๐ŸŒ How the Internet Works

From typing a URL to seeing a page โ€” every step explained

Before you build for the web, you need to understand what the web actually is. This course explains every step that happens when you open a website โ€” DNS, HTTP, browsers, security, APIs, and deployment. Ten focused lessons. No fluff.

๐Ÿ”—

Connected curriculum โ€” Course 1 of 4

Start here. Understanding how the internet works gives you context for everything else โ€” why we use Git, what HTML and CSS do, how Python scripts talk to the web. Everything connects back to this foundation.

Next: Save Your Code Challenge โ†’

~2 hours total10 lessons210 learners
10
Lessons
~2 hrs
Duration
Beginner
Level
Free
Price
Start Course

What you'll learn

Understand what happens from the moment you type a URL to seeing a page
Know what IP addresses, DNS, ports, and protocols actually do
Read and understand HTTP requests and responses
Understand the roles of HTML, CSS, and JavaScript in a browser
Use browser DevTools to inspect any website
Understand what domains, hosting, and deployment mean
Know how HTTPS protects your data
Understand what APIs are and why every app uses them
Inspect a real website using DevTools
Deploy your first live page to the internet

Course curriculum

What happens when you open a website?

10 min

IP addresses, ports, and protocols

11 min

HTTP requests and responses

12 min

HTML, CSS, and JavaScript โ€” who does what?

10 min

After this course โ†’

Save Your Code Challenge

You now understand what the web is. The next course teaches you the terminal and Git โ€” the tools every developer uses to manage code before it ever reaches a browser.

View Save Your Code Challenge โ†’