HTTP2

Goal is to reduce latency, but keep the same methods, status codes, and header fields. Changes how data is formatted and transmitted between clients

Prioritises transmission of requested objects, and give a request a weight to each request to indicate priority
Server pushes additional objects to client, by sending multiple responses to a single client request, before receiving explicit
Head of line blocking
- Before in HTTP 1.1 the request are blocked by large requests, as objects are delivered in sequence, and a workaround is to setup multiple TCP connections to request many objects at once
- In version 2, objects are divided into frames and frame transmission is interleaved in a round robin fashion

HTTP3

Improved performance even further by using streaming, by using the "QUIC" protocol over a bare UDP connection

HTML 1.0 Is written by Tim Berners-Lee
HTML 1,2,3,4, 4.01 published in in 1999
XHTML is an extensible version of HTML, based on XML
HTML5
- New elements, section for documents, figure for content flow, video, audio, canvas for multimedia
- New APIs to prompt users, like alert(), confirm(), prompt(), and printing with print() HTML is a markup language that uses tags

(list and explanation of common html tags)

CSS defines the visual style of a document