Cabletron Systems bridges, switches manual Fddi, Fnb, Ieee, Ietf

FDDI to Impedance

FDDI

Fiber Optics

Fiber Distributed Data Interface. A high-speed networking technology. FDDI requires that stations only transmit data when they have been given permission by the operation of the network, and dictates that stations will receive information at pre-determined intervals. See also Token.

Network media made of thin filaments of glass surrounded by a plastic cladding. Fiber optics transmit and receive information in the form of pulses of light. See multimode and single mode.

File	A collection of related data.
Fileserver	A network server device which stores and maintains data files for access
	and modification by users.
Firmware	The software instructions which allow a network device to function.
Flash EEPROM	See EEPROM.
FNB	Flexible Network Bus. A Cabletron Systems backplane design which
	enables an FNB-configured chassis to support multiple network
	technologies simultaneously.
Frame	A group of bits that form a discrete block of information. Frames contain
	network control information or data. The size and composition of a frame
	is determined by the network protocol being used. Frames are typically
	generated by operations at the Data Link Layer (Layer 2) of the
	OSI Model.
Gateway	A device which connects networks with dissimilar network architectures
	and which operates at the Application Layer of the OSI Model. May also
	be used to refer to a router.
Heartbeat	See SQE.
Hexadecimal	A base 16 numerical system. Digits in hexadecimal run from 0 to 9 and
	continue from A to F, where F is equivalent to the decimal number 16.
Host	A device which acts as the source or destination of data on the network.
IEEE	Institute of Electrical and Electronic Engineers. A standards-making body.
IETF	Internet Engineering Task Force. A standards-making body.
Impedance	A measure of the opposition of electrical current or signal flow in a length
	of cable.

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