HTTP1.0 HTTP 1.1 HTTP 2.0主要区别

1.0和2.0:  https://www.zhihu.com/question/34074946

1.0和1.1: http://blog.csdn.net/forgotaboutgirl/article/details/6936982

三者:  http://blog.csdn.net/linsongbin1/article/details/54980801