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Glossary
GL-5
3162-A2-GB20-40
August 2000
The worldwide internetwork, which predominantly uses the TCP/IP protocol.
An interconnected collection of networks (also called an internet).
Internet Protocol address. The address assigned to an internet host.
International Standards Organization.
International Telecommunications Union. The telecommunications agency of the United
Nations, established to provide standardized communications procedures and practices.
Before March 1993 it was called CCITT.
Kilobits per second. One kilobit is usually taken to be 1,024 bits.
Local Area Network. A privately owned and administered data communications network
limited to a small geographic area.
Line Build-Out. The amount of attenuation of the transmitted signal that is used to
compensate for the length of wire between the transmitter and the receiver.
Liquid Crystal Display. Thin glass plates containing liquid crystal material. When voltage is
applied, the amount of light able to pass through the glass plates is altered so that
messages can be displayed.
Link Control Protocol.
Light Emitting Diode. A light or status indicator that glows in response to the presence of a
certain condition (e.g., an alarm).
The physical connection between one location and another used for data transmission.
The protocol that regulates the communication between two network nodes.
A trap that identifies the condition of the communications interface (linkDown or linkUp
traps).
Line LoopBack. A test in which the received signal on the network interface is looped back
to the network without change.
Loss of Frame. Occurs when a DS1 terminal is unable to synchronize on the DS1 signal
for some interval.
Loss Of Frame Count. The number of LOFs declared.
A test that verifies a device’s operation by connecting the device’s output to the device’s
input.
Loss of Signal. The T1 line condition where there are no pulses.
Link Quality Reports.
Megabyte or megabytes. A unit of memory measurement equal to approximately one
million bytes (typically 1,048,576 bytes).
Megabits per second. One megabit is 1,048,576 (1024
2
) bits.
The structure containing the menu hierarchy starting at a Top-Level menu and extending
down to various device functions.
Management Information Base. A database of managed objects used by SNMP to provide
network management information and device control.
MIB Release 2. The current Internet-standard MIB, defined by RFC 1213.
A compact assembly functioning as a component in a larger system or unit.
Internet
internetwork
IP address
ISO
ITU
kbps
LAN
LBO
LCD
LCP
LED
link
link layer protocol
link trap
LLB
LOF
LOFC
loopback test
LOS
LQR
MB
Mbps
menu tree
MIB
MIB II
module