Cookie
BackendA small value the browser attaches to every request.
How a stateless protocol manages to remember you. The browser stores it and sends it automatically with each request to that site. Marking one HttpOnly prevents JavaScript from reading it, which stops an injected script stealing a session.
See also Session, HttpOnly, JWT
HTTP
FrontendThe request-and-response protocol of the web.
The rules by which a client asks and a server answers. A request is a method, a path, headers, and maybe a body; a response swaps the method for a status code. Stateless by default.
See also Status code, Stateless, Endpoint
Stateless
BackendEach request starts from nothing.
The server remembers nothing about you between requests by default. Memory has to be added deliberately, which is exactly what cookies and sessions are for.
See also HTTP, Session, Serverless