5 Questions
Which protocol uses port 21?
FTP
Which protocol uses port 80?
HTTP
Which protocol uses port 443?
HTTP
Which protocol uses port 143?
IMAP
Which protocol uses port 465 or 587?
SMTP
Test your knowledge of protocol and service abbreviations and their associated ports. Identify abbreviations such as FTP, SSH, Telnet, SMTP, DNS, and more, along with their corresponding port numbers.
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