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Internet Address: The network address of a computer node. This
address identifies both which network the host is on and which host it is.
Refer to the Installing and Administering LAN/9000 Software manual
for detailed information about network addressing.
IP Address: See Internet Address glossary entry.
IRQ (interrupt request channel) A path through which a device can
get the immediate attention of the computer’s CPU. The PCI bus assigns
an IRQ path for each SCSI host adapter.
ISA (Industry Standard Architecture) A type of computer bus used in most PCs.
It allows devices to send and receive data 16 bits at a time.
KByte (kilobyte) A measure of computer storage equal to 1024 bytes.
LAN: See Local Area Network.
Local Area Network (LAN): A data communications system that
allows a number of independent devices to communicate with each other.
Local Bus A way to connect peripherals directly to the computer processor’s data
path. It bypasses the slower ISA and EISA buses. PCI is a local bus standard.
Local Network: The network to which a node is directly attached.
Logical Unit A subdivision, either logical or physical, of a SCSI device. Most
devices have only one logical unit, but up to sixteen are allowed for a 16-bit SCSI
bus and eight for an 8-bit SCSI bus.
LUN (logical unit number) An encoded three-bit number for the logical unit.
LVD (low-voltage differential) A robust design methodology that improves power
consumption, data integrity, cable lengths, and support for multiple devices while
providing a migration path for increased I/O performance.
Mainboard A large circuit board that holds RAM, ROM, the microprocessor,
custom integrated circuits, and other components that make a computer work. It also
has expansion slots for host adapters and other plug-in boards.
Main Memory The part of a computer’s memory that is directly accessible by the
CPU (usually synonymous with RAM).
