what protocol should be used to send a password securely

what protocol should be used to send a password securely

• ftp
• smtp
• telnet
• ssh   

    

 EXPLANATION

File Transfer Protocol

The File Transfer Protocol is a standard network protocol used for the transfer of computer files between a client and server on a computer network. FTP is on Port 21.

Secure Shell

Secure Shell is a cryptographic network protocol for operating network services securely over an unsecured network. The best known example application is for remote login to computer systems by users.Secure Shell (SSH) uses TCP port 22.

telnet 

Telnet is a protocol used on the Internet or local area network to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. Wikipedia

simple mail transfer protocol

The Simple Mail Transfer Protocol is a communication protocol for electronic mail transmission. As an Internet standard, SMTP was first defined in 1982 by RFC 821, and updated in 2008 by RFC 5321 to Extended SMTP additions, which is the protocol variety in widespread use today. Wikipedia

Standard port: 25, 587, 465