3Com SuperStack 3 NBX Administrator's Manual page 472

472 G
LOSSARY
latency
layering
LCD
LLC
loop start
MAC
MAC address
managed hub
MAU
MIB
modem
The sum of all the delays in an end-to-end connection.
The process of dividing complex software up into several layers, each of
which performs a specific task. Layering allows faster and easier software
development and is often used in public, open software.
Liquid Crystal Display. A low cost display technology.
Logical Link Control. A data link protocol for LANs that is part of the IEEE
802.2 standard and common to all LAN standards for OSI model data
link, level two transmissions.
The most common signaling method in the public telephone network,
typically used for residence and business CO lines.
Media Access Control. A sub-layer of the Data Link layer (Layer 2) of the
ISO OSI model responsible for media control. Also known as the "MAC
layer."
A unique 48-bit number that is encoded in the circuitry of a device to
identify it on a LAN. Also known as a "hardware address" or an
"Ethernet address."
A network device in which each port on the hub can be configured,
monitored, and enabled or disabled by a network administrator from a
hub management console or utility tied into an SNMP (Signaling Network
Management Protocol) platform. Hub management can also include
gathering information on network parameters.
Medium Attachment Unit. A transceiver that provides the correct
electrical or optical connection between the computer and IEEE 802.3
LAN media.
Management Information Base. A database that can be accessed by a
gateway running CMIP (Common Management Information Protocol),
CMOT (CMIP Over TCP/IP), or SNMP (Signaling Network Management
Protocol) network management protocols. The MIB defines variables
needed by the protocol to monitor and control components in a network.
Managers can fetch or store these variables.
MOdulator/DEModulator. A modem converts a binary bit stream to an
analog signal and vice versa.