When we first try to connect to a website using https we send our request to port 443. After the handshake and all those preliminary actions needed to request and verify the certificate is done and from hereupon it's just like using plain http what port is used? Is it 80 or 443?
I'm asking this because my professor believes it's 80 since it's just http on the application layer and then TLS on the transport layer. But not only I don't believe TLS is on the application layer bur I also think the port used is 443. So which is it?