HTTP
HTTP, the Hypertext Transfer Protocol, is the request-response protocol used by browsers, APIs, reverse proxies, and many service integrations.
Why it matters
It is the transport layer behind most of the web-development notes in this vault, including REST, GraphQL, reverse proxies such as Traefik, and authentication flows such as JWT authentication.
Practical view
For application work, HTTP is less about memorizing every RFC detail and more about understanding methods, status codes, headers, caching, auth, and proxy behavior.