Around the time of the release of Drupal 8 there is a more significant, but subtle evolution taking over the web. This is HTTP/2, a new and improved version of the venerable protocol powering not only web sites and applications but a lot of infrastructure messaging for energy, industry and more.
HTTP/2 is a new version of the popular protocol that is for communication between the web server and the browser. It is a lower level technology than Drupal, so taking HTTP/2 into use does not require any modifications to your application or installation of Drupal modules. Drupal 8 introduces the request-response model to Drupal developers, but on a higher level - this is not to be confused with HTTP/1.1 vs. HTTP/2.