Difference between HTTPS and SSL/TLS

• SSL/TLS works on top of the transport layer (i.e., on the Transport Control Protocol-TCP). 
• HTTP is an application layer protocol.
• HTTPS is an application layer protocol, but runs over SSL/TLS, hence it is called as HTTP over SSL.
• SSL/TLS session is first established, then all HTTP data packets are wrapped into the secured SSL/TLS packets before sending and after receiving. 
• SSL/TLS connection between endpoints are established before HTTP data packets are wrapped into the SSL/TLS packets.
• For HTTP communication, the TCP/IP layer and corresponding protocol layer shall look like this:

• For HTTPS communication, the TCP/IP layer and corresponding protocol layer shall look like this:

• For HTTPS communication to work, SSL/TLS is mandatory, and inverse is not true. 
• Finally, HTTPS, SFTP, SSH are all working on Application Layer and uses SSL/TLS in Transport Layer to protect the communication channel.