What is the standard port number for HTTPS?

The standard port number for HTTPS, which stands for Hypertext Transfer Protocol Secure, is 443. HTTPS is the secure version of HTTP, and it is used to encrypt the data exchanged between a user's web browser and a web server. This encryption helps protect sensitive information, such as passwords or credit card numbers, during transmission over the internet.

Port 443 is specifically designated for HTTPS traffic, allowing web servers to listen for and respond to secure connections. This helps web browsers identify that they are connecting to a secure site. The use of this port is a key aspect of securing data transfer on the web, as it ensures that communications over HTTPS are encrypted, adding a crucial layer of security to online interactions.

Other port numbers, such as 21 (used for FTP, which is File Transfer Protocol), 25 (used for SMTP, which is Simple Mail Transfer Protocol), and 80 (used for HTTP, which is the unsecured version of HTTP), serve different purposes and are not suitable for secure web communications.