What is HTTP/1.0?
HTTP/1.0 is one of the versions of the Hypertext Transfer Protocol (HTTP), used for the transmission of content such as HTML between clients (e.g., web browsers) and web servers. HTTP versions were introduced as follows: HTTP/0.9 in 1991, HTTP/1.0 in May 1996, HTTP/1.1 in January 1997, and HTTP/2 in May 2015.
The first version, HTTP/0.9, was extremely simplistic, with no specification for responses and only the GET method available. HTTP/1.0 introduced response headers and expanded methods by adding POST, PUT, DELETE, and others. Additionally, HTTP/1.0 distinguished itself from HTTP/0.9 by including the protocol version in the request header.
HTTP/1.1 further expanded the range of supported methods and introduced name-based virtual hosting. It also included features such as KeepAlive, which maintains the connection to process multiple requests without needing to reconnect, and request pipelining, which sends multiple requests without waiting for individual responses. These advancements reduced TCP connection resource usage and improved responsiveness.
Currently, HTTP/1.1 is the most widely used version. Meanwhile, HTTP/2 offers further improvements, including enhanced TCP resource utilization, performance optimization, and strengthened security.