When the protocol HTTP is transmitted over SSL, which of the following ports is used by default?

Port 80 is the default port for unencrypted HTTP traffic, not for HTTP secured with SSL/TLS.

When HTTP is transmitted over SSL (or TLS), it becomes HTTPS, which is assigned port 443 by the Internet Assigned Numbers Authority (IANA) as its well-known default port. This port is universally recognized by browsers and servers to initiate a secure encrypted connection before any HTTP data is exchanged.

Port 448 is not a standard or well-known port assigned to HTTPS or any common secure web protocol.

Port 8080 is a common alternative port for plain HTTP traffic and development servers, not the default for SSL-encrypted HTTP.