HTTPS and modern HTTP

Final HTTP inspection

Bring the course together by explaining a real document request, its security and caching policy, and the additional resources it triggers.

15 minute lesson

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Open the Network panel on a site you use and select its main document request. Write down:

  1. URL, method, and protocol version
  2. status code and any redirect chain
  3. request and response content types
  4. cache freshness and validators
  5. cookies sent or set
  6. CORS and security headers
  7. transferred size and timing

Then choose one stylesheet or image requested by the document and repeat the inspection. Explain why its caching policy differs from the HTML document.

Finally, reproduce a safe public request with curl -I or curl -i. Compare its headers with the browser’s. Differences may come from cookies, content negotiation, compression, or an intermediary cache.

You now have the vocabulary to explain an HTTP exchange instead of treating the Network panel as a wall of data.

Quick check

Result

You got of right.

Quick check

Result

You got of right.

Lesson completed