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IND 510 · 2 credits
How the Internet Works
How the internet actually works, from the moment you type a URL to the response rendering on screen. You will learn IP addresses, ports, DNS, packets, TCP, raw HTTP, curl, cookies and sessions, HTTPS and certificates, caching and CDNs, and finish with a practical checklist for debugging any connection.
Local progress0/25 lessons · 0%
What you'll learn
- ✓Trace the full journey of a web request, from URL to rendered response
- ✓Explain IP addresses, ports, and DNS, and inspect them with dig and nslookup
- ✓Read and write raw HTTP requests and responses, and drive APIs with curl
- ✓Describe how cookies and sessions keep a user logged in across requests
- ✓Explain what TLS certificates prove and what HTTPS protects you from
- ✓Debug a broken connection layer by layer with a repeatable checklist
Unit 1The Big Picture
Unit 2Addresses and Names
Unit 3Reliable Delivery: Packets, TCP, and UDP
Unit 4HTTP I: Requests and Responses
Unit 5HTTP II: Driving the Web with curl
Unit 6Cookies, Sessions, and State
Unit 7HTTPS and TLS: Locking the Conversation
Unit 8Caching and CDNs: Why Fast Sites Are Fast
Unit 9Capstone: Debugging Connectivity
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