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<td>'''22'''</td><td>'''SSH'''<td>'''Secure Shell''' - The Secure Shell is used to provide a secure, encypted, Telnet remote login to session top a remote host over a TCP/IPnetwork. This essentially provides a mechanism to log into a remote system. The original mechanism for remotely terminal access was the Telent protocol. Because Telnet transmits everything in plain text its use is now strongly discouraged in favor of the secure shell, which encrypts all communications, including log-in and password credentials. SSH also provides the mechanism by which files can be security tranfered using the ''scp'' client. SSH also now replaces both the ''rsh'' and ''rlogin'' clients.</td>