HTTP(Hyper Text Transfer Protocol) is one of many protocols used for transferring data (think of html pages, text, images, videos and much more) across machines.  There are other application layer protocols like FTP, SMTP, DHCP etc. 
HTTP was invente...

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HTTP (Hyper Text Transfer Protocol) is a crucial application layer protocol for data transfer across the web. The OSI model provides a conceptual framework for understanding how HTTP operates within networking layers. HTTP follows a stateless client-server model, with distinct request and response structures. Security issues in HTTP are addressed by HTTPS, which uses TLS encryption. HTTP has evolved from its original version to HTTP/1.1, which introduced persistent connections and chunked transfer encoding, and HTTP/2.0, which offers binary framing and multiplexing for improved performance. The upcoming HTTP/3.0 will rely on QUIC over UDP instead of TCP for even better performance and security.

HTTP Refresher: Things You Should Know About HTTP