Which port number is commonly associated with HTTP?

The commonly accepted port number for HTTP (Hypertext Transfer Protocol) is 80. This port is the default for web traffic and allows web servers and clients (such as browsers) to communicate and transfer data across the internet. When you access a website without specifying a port number in the URL, your browser automatically assumes it should use port 80 for the requests being made.

Understanding this is crucial, as HTTP is fundamental for the operation of the World Wide Web, enabling the retrieval of web pages and other resources.

While other port numbers are associated with different communications protocols—443 for HTTPS (which is HTTP over SSL/TLS for secure connections), 21 for FTP (File Transfer Protocol), and 25 for SMTP (Simple Mail Transfer Protocol) used for email—port 80 remains the standard for unencrypted web traffic.