1. Concept 1 – HTTP/0.9 - The One-Line Protocol HTTP/0.9 is the original, ultra-simple version of the Hypertext Transfer Protocol (HTTP). It allows for the retrieval of documents from a server using a single request line.
2. Concept 2 – HTTP/1.0 - The Stateless Protocol HTTP/1.0 introduced the concept of stateless communication, where each request is independent and not tied to any previous requests.
3. Concept 3 – HTTP/1.1 - The Persistent Protocol HTTP/1.1 improved upon its predecessor by allowing multiple requests to be sent over a single connection, reducing latency.
4. Concept 4 – HTTP/2 - The Multiplexed Protocol HTTP/2 introduced multiplexing, allowing multiple streams of data to be sent simultaneously over a single connection.
5. Concept 5 – HTTP/3 - The Next Generation Protocol HTTP/3 is built on QUIC, a transport layer network protocol that aims to improve performance and security.