Cyclades User's Guide manual Stop Bit, Subnet Mask, Sudo

Stop Bit	A bit which signals the end of a unit of transmission on a serial
	line.A stop bit may be transmitted after the end of each byte or
	character.
Subnet Mask	A bit mask used to select bits from an Internet address for subnet
	addressing. Also known as Address Mask.
Sudo	Sudo (superuser do) is a utility for Unix and Linux based systems
	that provides an efficient way to give specific users permission to
	use specific system commands at the root level of the system.
	Sudo also logs all commands and arguments. Using sudo, a
	system administrator can give some users or groups of users the
	ability to run some or all commands at the root level of system
	operation. It can control which commands a user can use on each
	host and see clearly from a log which users used which
	commands. Using timestamp files a system administrator can
	control the amount of time a user has to enter commands after
	they have entered their password and been granted appropriate
	privileges.
TACACS	Terminal Access Controller Access Control System.
	Authentication protocol, developed by the DDN community, that
	provides remote access authentication and related services, such
	as event logging. User passwords are administered in a central
	database rather than in individual routers, providing an easily
	scalable network security solution.
TACACS+	Terminal Access Controller Access Control System Plus. A
	protocol that provides remote access authentication,
	authorization, and related accounting and logging services, used
	by Cisco Systems.

TCP Keep-Alive Interval The time interval between the periodic polling of all inactive TCP/IP connections, checking that the client processes really are still there. After a certain period of inactivity on an established connection, the server's TCP/IP software will begin to send test packets to the client, which must be acknowledged. After a preset

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