Hyper Text Transfer Protocol Crash Course - HTTP 1.0, 1.1, HTTP/2, HTTP/3

HTTP is a protocol for transferring web pages, text, media, binary files and much more. It stands for hyper text transfer protocol and It is what the Internet pretty much runs on. In this video we will learn how HTTP works, how it is secured with HTTPS, will also show how to spin up an Http web server, and we will also go through the evolution of HTTP starting from HTTP 1.0 to HTTP 1.1 to HTTP/2 and eventually HTTP/3 which is still experimental.

Client / server
Client makes HTTP requests to a server that supports HTTP, the server (web server, http server like apache tomcat, nodejs etc..) responds back with the content. This could be an HTML page, images, JSON and much more.

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Jump Codes (Table of Content)
0:00 Intro
4:00 Client/Server Architecture
6:30 HTTP Request
9:30 HTTP Response
12:00 Demo Request/Response, Build Web Server
20:20 How HTTP Works?
26:20 HTTPS
27:35 HTTP 1.0
31:15 HTTP 1.1
36:55 HTTP/2
41:20 HTTP/3


HTTP anatomy
Request (browser, web app)
- URL
- Method type
- Headers
- Body
Response (web server)
- Status code
- Headers
- Body
HTTP 1.0 over tcp
- Application Layer 7
- new connection with each request.
HTTP 1.1 over tcp
- Persisted connection
HTTP/2 over tcp
- Compression
- Multiplexing
- Server Push
- SPDY
- Mostly secure by default
- Negotiates protocol during TLS (NPN/ALPN)
HTTP/2 over QUIC ( HTTP/3)
- Replaces TCP with QUIC (udp with congestion control)



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