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ISR651101-00 G Glossary-1
Glossary
activity LED
A port LED that indicates when frames are
entering or leaving the port.
adapter
The board that interfaces between the
host system and the target devices.
Adapter is synonymous with host bus
adapter, host adapter, and adapter board.
adapter port
A port on the adapter board.
adapter port beacon
An LED on the adapter. Flashing it enables
you to locate the adapter.
alarm
A message generated by the switch that
specifically requests attention. Alarms are
generated by several switch processes.
Some alarms can be configured.
arbitrated loop
A circular (ring) topology (versus
point-to-point) where two or more ports
can be interconnected, but only two ports
can communicate at a time. All communi-
cation passes through all ports connected
to the loop.
ASIC
Application specific integrated circuit. A
microchip designed for special applica-
tions such as Fibre Channel.
bandwidth
A measure of the volume of data that can
be transmitted at a specific transmission
rate. A 2Gbps Fibre Channel port can
transmit or receive at nominal rates of
2Gbps. This corresponds to actual
bandwidth value of 212MB.
boot code
The program that initializes a system or an
adapter. Boot code is the first program to
run when a system or a device within a
system, such as an adapter, is powered
on. FCode, BIOS, and EFI (enhanced
firmware interface) are all forms of boot
code for specific hardware/operating
system environments.
CHAP
Challenge-handshake authentication
protocol. CHAP is used for remote logon,
usually between a client and server or a
Web browser and Web server. A
challenge/response is a security mecha-
nism for verifying the identity of a person
or process without revealing a secret
password that is shared by the two
entities. Also referred to as a three-way
handshake.
CLI
Command line interface. Program inter-
face driven by entering commands and
parameters.