HTTP: HTTP/3

HTTP/3 is the newest “version” of HTTP.

It builds on the foundations laid by HTTP/2 but introduces significant changes, primarily by shifting from TCP (Transmission Control Protocol) to QUIC (Quick UDP Internet Connections) as the underlying transport protocol.

This means that HTTP/3 will be based on a completely different tech stack compared to HTTP/2 and HTTP.

HTTP/3 offers several enhancements:

Reduced Latency: HTTP/3, by using QUIC, diminishes connection setup time. This means websites can load content quicker, especially noticeable on mobile networks or other high-latency environments.

Connection Resilience: With QUIC, if a user changes from one network to another (e.g., switching from Wi-Fi to 4G), the connection remains intact, leading to a smoother browsing experience.

Improved Congestion Control: QUIC has its congestion control mechanism, allowing for better data flow, especially in networks with packet loss.

Enhanced Security: While HTTP/2 encouraged the use of HTTPS, QUIC has built-in encryption, making browsing inherently more secure.

You can see the protocol version used by your website from the browser devtools, in the Network panel. h2 means HTTP/2 and h3 means HTTP/3:

Lessons in this unit:

0:	Introduction
1:	An HTTP request
2:	HTTP Methods
3:	HTTP Status Codes
4:	HTTP Client/Server communication
5:	HTTP Request Headers
6:	HTTP Response Headers
7:	HTTPS
8:	HTTP/2
9:	▶︎ HTTP/3

Are you intimidated by Git? Can’t figure out merge vs rebase? Are you afraid of screwing up something any time you have to do something in Git? Do you rely on ChatGPT or random people’s answer on StackOverflow to fix your problems? Your coworkers are tired of explaining Git to you all the time? Git is something we all need to use, but few of us really master it. I created this course to improve your Git (and GitHub) knowledge at a radical level. Launching May 21, 2024. Join the waiting list!