HTTP1.0、HTTP1.1 和 HTTP2.0 的区别
https://www.cnblogs.com/heluan/p/8620312.html

http1 http2 http 3 区别
https://blog.csdn.net/weixin_41205419/article/details/105510318

HTTP1.x、HTTP2、HTTPs
http://www.manongjc.com/detail/15-anfjgkgvbgxrsuc.html

从 HTTP/1 到 HTTP/2，以及即将到来的 HTTP/3
https://zhuanlan.zhihu.com/p/84281368

HTTP/1、HTTP/2、HTTP/3
https://www.cnblogs.com/guchengnan/p/12468033.html