[TBD]HTTP/3 for heterogenous network seamless transition

Introduction

Laymen explanation

Do you know that http/3 allows to go from LTE to WIFI without renegotiating the session. Browser will use same http session.

If you are curious to know about this and other strengths of upcoming http/3 protocol, then this document helps you.

Technical explanation

One of the most notable issue is the fact that the single connection of HTTP/2 ends up being a bottleneck for data in a low network quality environment — as network quality degrades, and packets are dropped, the single connection slows the entire process down, and no additional data can be transferred during this time of retransmission.

HTTP/3 implement a new layer protocol called QUIC (Quick UDP Internet Connection). This supports a set of multiplexed connections over UDP and has been designed to provide TLS 1.3 by default by, reducing latency in both connection and data transport.

Why need to revise HTTP/2

• Connection migration - it allows to transfer networks (for example from LTE to WIFI) without renegotiating the session.

• Connection establishment latency reduction

• Multiplexing without HOL(head-of-line) blocking

Layered architecture

HTTP protocol stack transition timeline

QUIC in HTTP3

QUIC protocol properties

• QUIC uses the traditional HTTP ports of 80 and 443

• By default, QUIC packets are encrypted.

• if QUIC communication does not work between a client and a server, the traffic will fall back to traditional HTTP/HTTPS over TCP

TLS packet capture example

HTTP/3 Supported browsers

• Safari,

• Microsoft Edge,

• Mozilla Firefox,

• Google Chrome

Reference

https://sites.google.com/site/jbsakabffoi12449ujkn/home/networking/http-2

https://images.app.goo.gl/tzcSvkYLmG1MAHeL8

https://medium.com/faun/http-2-spdy-and-http-3-quic-bae7d9a3d484

https://www.fastvue.co/fastvue/blog/googles-quic-protocols-security-and-reporting-implications/

https://images.app.goo.gl/hD2L4K3DDNtpJVD7A

https://en.wikipedia.org/wiki/HTTP/3

https://images.app.goo.gl/uMjVZ5XnQYXe2HkE7

https://images.app.goo.gl/K6rcZXjZdvNPXNAt5

https://dev.to/eesnaola/http-2-vs-http-3-52hi

https://youtu.be/SZEZHou6Rn4?t=248

https://images.app.goo.gl/HPTxLoY9Acjf3Doo6