BeginnerStarter2 weeks

Internet Fundamentals

Build the mental model of how requests move from a user device to backend services and back.

Topic 1 of 24

Prerequisites

Basic computer literacy

Key Concepts & Skills

How the Web Works
DNS
HTTP/HTTPS
Browsers
Client vs Server
TCP/IP Basics
Read request/response flows
Explain DNS resolution
Understand network layers
Inspect HTTP traffic

Learning Outcomes

Understand the core principles of How the Web Works
Configure and deploy DNS successfully
Troubleshoot common issues with HTTP/HTTPS
Understand the core principles of Browsers
Configure and deploy Client vs Server successfully
Troubleshoot common issues with TCP/IP Basics
Understand the core principles of Read request/response flows
Configure and deploy Explain DNS resolution successfully
Troubleshoot common issues with Understand network layers
Understand the core principles of Inspect HTTP traffic

Resources

Practice Exercises

Trace a DNS lookup with a command-line tool.Inspect request headers in browser devtools.Draw a client-server request lifecycle.

Project Task

Create an illustrated web request lifecycle explainer.

Quiz

What happens between entering a URL and receiving HTML from a server?Explain the answer with one real-world example.List one mistake a beginner might make here.

Notes