'''S'''ecure'''SH'''ell is an enhanced [Shell] used for secure (encrypted)  communication with a remote computer. It is the preferred replacement for [Telnet].%%%

!! SSH
[SSH] encrypts '''ALL''' traffic.
The login transaction and all further traffic is secured against casual eavesdropping.
It is worth mentioning that '''scp''' is a '''S'''ecure '''C'''o'''p'''y program that adheres to the same principal and is usually (?) packaged with the SSH program.

!! Telnet
[Telnet] is a shell '''without''' any security features (encryption).
Login passwords and all further transmissions are ''sent in the clear''. ie:- anyone with access to the traffic has the potential to read it.

[Telnet] still has it's uses (checking mail accounts, server versions) and [SSH] can be vulnerable, however for any traffic sent over an open network (MelbourneWireless), SSH provides a suitable level of protection.


!! Where to get it.
(http://www.ssh.com/ SSH) - commercial version
(http://www.openssh.org/ OpenSSH) - a FREE version of the SSH protocol suite (BSD Licence)
(http://putty.obengelb.de/ Putty) - PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms
The front page of (http://www.openssh.org/ OpenSSH.org) has a comprehensive listing of SSH alternatives for most Operating Systems, under the  '''Alternatives''' menu.