Harvard Extension School
CSCI E-12 Fundamentals of Web Site Development | Fall 2019

## HTTP/2

- HTTP/2
- HPACK

### What are the key differences to HTTP/1.x?

From the HTTP/2 FAQ:

At a high level, HTTP/2:

- is binary, instead of textual
- is fully multiplexed, instead of ordered and blocking
- can therefore use one connection for parallelism
- uses header compression to reduce overhead
- allows servers to “push” responses proactively into client caches

Copyright © David Heitmeyer