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<td>'''22'''</td><td>'''SSH'''<td>'''Secure Shell''' - The Secure Shell is used to provide a secure, encypted, remote logon session to a remote host over a TCP/IP network. The original mechanism for remotely terminal remote access was the Telnet protocol. Because Telnet transmits everything data 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>