1、三次握手和四次挥手
2、xss攻击与csrf攻击
3、浏览器的SameSite策略
https://www.jianshu.com/p/7fb032cf2a98
https://blog.csdn.net/leftfist/article/details/112283784
https://www.jianshu.com/p/7fb032cf2a98
https://blog.csdn.net/leftfist/article/details/112283784
https://www.jianshu.com/p/7fb032cf2a98
https://blog.csdn.net/leftfist/article/details/112283784