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API traffic and authentication basics

← Learning Atlas · Path 22 of 22

7 ordered steps, from API to Session.

Misc tech termsConcepts and methodology

  1. Step 1: API

    API starts the path because the learner first needs to identify the boundary where one program asks another for data or action.

  2. Step 2: REST

    REST gives that boundary a common design style, making endpoints, resources, and verbs easier to reason about.

  3. Step 3: HTTP/HTTPS

    HTTP/HTTPS belongs next because REST traffic needs a transport layer with methods, headers, status codes, and security expectations.

  4. Step 4: CORS

    CORS matters once browser-based requests enter the picture, because it explains why a correct API can still be blocked by policy.

  5. Step 5: OAuth

    OAuth is introduced after traffic mechanics because many APIs need delegated access rather than simple anonymous calls.

  6. Step 6: JWT

    JWT follows OAuth because tokens are a common way delegated identity and authorization claims move through API systems.

  7. Step 7: Session

    Session closes the path by contrasting token-based calls with server-tracked login state that shapes real user authentication flows.