What is the difference between Telnet and SSH?
The previous answers are correct. SSH sends your login and password (and everything else) converted into secret code that gets unencoded at the other end. That way anyone that is sniffing one of the systems involved cannot see and steal your password. However, because SSH is encrypted it is not appropriate for some uses. Where speed is needed, or over really bad slow connections, or when a raw connection is needed. For example, system administrators often use telnet to troubleshoot other services such as webserver or email because they can see exactly what is and is not getting sent and received. Also telnet is easier to include into other programs so in cases where security is not a big deal, telnet will often be used. Such as online games.
