Which port is the default for SSH (Secure Shell)?

1. Standard well-known port assignments (IANA): • 21: FTP control • 22: SSH (Secure Shell) • 23: Telnet (cleartext — deprecated for management) • 25: SMTP • 80: HTTP • 443: HTTPS 2. SSH provides encrypted remote shell + file transfer (SCP, SFTP) + tunneling. 3. Best practice: disable Telnet entirely. Disable SSH root login. Use key-based auth (not password). _Source: RFC 4251 (SSH protocol) + IANA Service Name and Port Number Registry._