What is HTTP?
Blog post from Postman
HTTP (Hypertext Transfer Protocol) is a crucial application layer protocol in the internet's architecture, defining how data is exchanged between clients and servers via a TCP connection. When a browser sends an HTTP request to a server, the server responds with the requested data and metadata, such as status codes and headers, which the browser then renders as web content. HTTP requests are composed of methods like GET, POST, PUT, and DELETE, a URL, headers, and sometimes a body, while responses include status codes, headers, and a body containing the data. HTTP has evolved from HTTP/1.1 to HTTP/2, with improvements such as multiplexing, header compression, prioritization, and server push, which enhance speed and efficiency. Postman is a multi-protocol API platform that aids in working with various HTTP-based API architectures, like REST, GraphQL, and SOAP, by facilitating collaborative API development, testing, traffic capture, and mock API creation.
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