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, security-equivalent programs for suchUnix standards as Telnet, FTP, and many other communications-oriented 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.