Phase 1 · Internet & Backend Basics
TopicsHeaders & Cookies
Part of the Backend Developer Roadmap.
Summary
Headers carry metadata about a request/response (content type, auth tokens, caching rules); cookies are a specific header-based mechanism for the server to store small data on the client.
How to Learn This
- 1Inspect real request/response headers using your browser's DevTools Network tab.
- 2Set a cookie from a Node.js server and read it back on the next request.
- 3Learn the security-relevant cookie flags: HttpOnly, Secure, SameSite.
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