Hypertext Transfer Protocol (HTTP) is the foundation of data communication for WWW. This protocol defines how messages are formatted, transmitted, and processed over the Internet. Let's have a quick recap of HTTP in this section.
HTTP has been consistently evolving over time. So far, there are three versions. HTTP/0.9 was the first documented version, which was released in the year 1991. This was very primitive and supported only the
GET method. Later, HTTP/1.0 was released in the year 1996 with more features and corrections for the shortcomings in the previous release. HTTP/1.0 supported more request methods such as
POST. The next release was HTTP/1.1 in the year 1999. This was the revision of HTTP/1.0. ...