Which non-standard port is commonly used for HTTPS alternatives?

• A. 443 TCP
• B. 8443 TCP
• C. 8080 TCP
• D. 8443 UDP

Answer: (B)

Non-standard ports are often used for HTTPS to run secure web traffic on something other than the default port. Among common practice, 8443 over TCP is the widely adopted alternative HTTPS port. It’s frequently used by application servers and admin consoles when 443 is in use or when separating services, with examples like Tomcat often configuring HTTPS on 8443 by default. Since HTTPS runs over TCP, the UDP option isn’t appropriate. The standard HTTPS port is 443, and 8080 is typically used for HTTP alternatives, not HTTPS. So the commonly used non-standard HTTPS port is 8443 TCP.