Part 1. Moving to HTTP/2
To understand why HTTP/2 is creating such a buzz in the web performance industry, you first need to look at why it’s needed and what problems it looks to solve. Therefore, the first part of this book introduces HTTP/1 to those readers who aren’t familiar with exactly what it is or how it works; then it explains why a version 2 was needed. I talk at a high level about how HTTP/2 works, but leave the low-level details until later in the book. Instead, I close this part by talking about the various methods you can use to deploy HTTP/2 to your site.