Which well-known TCP port number is traditionally assigned to the Hypertext Transfer Protocol (HTTP) when it is operating without any form of encryption (that is, not HTTPS)?
TCP port 25
TCP port 443
TCP port 22
TCP port 80
HTTP without encryption normally uses TCP port 80. Port 443 is reserved for the encrypted variant, HTTPS. Ports 22 and 25 belong to Secure Shell (SSH) and Simple Mail Transfer Protocol (SMTP), respectively, so they are incorrect in this context.
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