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LOSSARY
3
Intelligent Switching Mode
A packet forwarding mode, where the Switch moni-
tors the amount of error traffic on the network and
changes the method of packet forwarding accord-
ingly.
IPX
Internetwork Packet Exchange. A protocol allowing
communication in a NetWare network.
IP address
Internet Protocol address. A unique identifier for a
device attached to a network using TCP/IP. The
address is written as four octets separated with
full-stops (periods), and is made up of a network
section, an optional subnet section and a host sec-
tion.
LAN
Local Area Network. A network of connected com-
puting resources (such as PCs, printers, servers) cov-
ering a relatively small geographic area (usually not
larger than a floor or building). Characterized by
high data rates and low error rates.
latency
The delay between the time a device receives a
frame and the time the frame is forwarded out of
the destination port.
line speed
See
baud rate
.
main port
The port in a resilient link that carries data traffic in
normal operating conditions.
MDI / MDIX
Medium Dependent Interface. A type of Ethernet
twisted pair port connection: MDI ports connect to
MDIX (cross-over) ports using straight-through
twisted pair cabling; MDI-to-MDI and MDIX-to-MDIX
links use cross-over twisted pair cabling.
MIB
Management Information Base. Stores a device’s
management characteristics and parameters. MIBs
are used by the Simple Network Management Proto-
col (SNMP) to contain attributes of their managed
systems. The Switch contains its own internal MIB.
multicast
Single packets copied to a specific subset of net-
work addresses. These addresses are specified in
the destination-address field of the packet.
PACE
Priority Access Control Enabled. 3Com’s innovative
technology which works in conjunction with a
switch to control the latency and jitter associated
with the transmission of multimedia traffic over
Ethernet and Fast Ethernet.
POST
Power On Self Test. An internal test that the Switch
carries out when it is powered-up.