What Is Common Port Numbers?
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Common port numbers include:
1. SSH (Secure Shell): 22 2. Telnet: 23
3. HTTP (Hypertext Transfer Protocol): 80
4. HTTPS (Secure Hypertext Transfer Protocol): 443
5. SMTP (Simple Mail Transfer Protocol): 25
6. POP3 (Post Office Protocol version 3): 110
7. IMAP (Internet Message Access Protocol): 143
8. FTP (File Transfer Protocol): 20 and 21