(1) Simple version:
[1] https://www.sohu.com/a/320430855_819924
[2] https://www.cnblogs.com/kayvenguo/p/11002211.html
Transmission method (plaintext and encryption) —> Security ----> Standard port (443,80) —> Function method (transport layer and application layer) —> The display in the browser is different (http: insecure, https : Security)
(2) In-depth study
[1] https://blog.csdn.net/qq_36908872/article/details/80602437
[2] https://blog.csdn.net/xiaoming100001/article/details/81109617
can be read Read, to tell me the difference is that https is better than http, https will become the mainstream protocol
