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APPENDIX E Glossary
AL_PA or
Arbitrated Loop
Physical Address
A one-byte value used to identify a port in an Arbitrated Loop
topology. The value of the AL_PA corresponds to bits 7:0 of the
24-bit Native Address Identifier.
Arbitrated Loop A Fibre Channel topology structured as a loop and requiring a
port to successfully arbitrate prior to establishing a circuit to
send and/or receive frames.
Arbitration The process of selecting one respondent from a group requesting
service at the same time.
Close (CLS) An Arbitrated Loop protocol used to terminate a loop circuit.
Current Fill
Word
The fill word that the Loop Port State Machine uses when a fill
word is to be transmitted.
DHCP Dynamic Host Control Protocol. An Internet-based protocol
enabling nodes to dynamically acquire network addresses for
periods of time.
Duplex Cable Two fibers in one cable suitable for duplex transmission.
Fiber Optics Light transmission through optical fibers for communication or
signaling
Fibre Channel Fibre Channel is a data transfer interface technology that maps
several common transport protocols including IP and SCSI,
allowing it to merge high-speed I/O and networking
functionality in a single connectivity technology. Fibre channel
is an open standard as defined by ANSI and OSI standards and
operates over copper and fiber optic cabling at distances of up
to 10 Kilometers. It is unique in its support of multiple inter-
operable topologies including point-to-point, arbitrated-loop
and switching and it offers several qualities of service for
network optimization. With its large packet sizes, Fibre Channel
is ideal for storage, video, graphic and mass data transfer
applications.
LED Light-Emitting Diode. A status indicator on a switch.
LIP/LIP sequence Loop Initialization Primitive. A sequence used to accomplish
one or more of the following objectives:
• Initiate a procedure that results in unique addressing for all
nodes.
• Indicate a switch failure.
• Reset a specific node.
Mb/s Megabits per second, 1,024,000 bits per second.
MB/s Megabytes per second, 8,192,000 bits per second.
One byte = 8 bits
Node An entity with one or more N_Ports or NL_Ports.