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Do Not Allocate a Terminal
Select this option when not using terminal. If this option is turned on, a terminal(tty) for input/output is not assigned and thus input/output on the screen is not possible. Use this option if you want to use tunneling only without terminal access.
Accept Automatically accept and save the host key automatically upon first initial connection
If the option is turned on, when connecting to a server where the host key is not registered, the host key is automatically saved without going through the authentication process.