Which of the following would be used as a secure substitute for Telnet?

A.
SSH

B.
SFTP

C.
SSL

D.
HTTPS

Explanation:
Secure Shell (SSH) is a tunneling protocol originally designed for Unix systems. It uses encryption
to establish a secure connection between two systems. SSH also provides alternative, securityequivalent programs for such Unix standards as Telnet, FTP, and many other communicationsoriented applications. SSH is available for use on Windows systems as well. This makes it the
preferred method of security for Telnet and other cleartext oriented programs in the Unix
environment.