Request Response
In plain terms
The basic client-asks, server-answers communication pattern.
Going deeper
In the request-response model, a client sends a request and waits for the server's reply, the foundation of HTTP. Each exchange is a discrete round-trip.
Under the hood
Synchronous by nature; contrasts with event-driven/streaming models like websockets and pub/sub.
Examples
HTTP requests, API calls, REST, the browser-server exchange.
Think of it like...
Like asking a question and waiting for the answer before continuing.