Which of the following uses port 22 by default? (Select THREE).

SSH (Secure Shell) natively uses port 22 as its well-known port for encrypted remote administration.

SSL is not a standalone service with its own dedicated well-known port; it is a cryptographic layer used by other protocols such as HTTPS (443) and SMTPS (465).

TLS similarly is a transport security layer, not an application service with its own port; it wraps other protocols on their respective ports.

SFTP (SSH File Transfer Protocol) is a file transfer subsystem that runs entirely within an established SSH session and therefore uses port 22.

SCP (Secure Copy Protocol) transfers files by invoking SSH as its transport, inheriting port 22 as its default port.

FTPS (FTP over SSL/TLS) uses port 990 for implicit mode or port 21 for explicit mode, not port 22.

SMTP uses port 25 (or 587 for submission) for email transfer, not port 22.