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UNB/Year 4/Semester 2/CS3873/2024-01-31.md

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+Lecture Topic: Advanced HTTP
+
+# 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 Versions
+- 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
+CSS defines the visual style of a document