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LED (Light Emitting Diode):
The lights on a
hardware device representing the activity
through the ports.
MAC (Medium Access Control) Address:
A
unique number that distinguishes network
cards.
Mbps (Mega Bits Per Second):
A
measurement of millions of bits per
second.
MDI/X (Media Dependent Interface/Cross-
over):
Port on a network hub or switch
that crosses the incoming transmit lines
with the outgoing receive lines.
MHz (MegaHertz):
One million cycles per
second.
MIB II:
A database containing performance
information and statistics on each device in
a network.
MIPS (Million Instructions Per Second):
A
measurement of processing speed.
NAT (Network Address Translation):
An
internet standard that enables a LAN to
use one set of IP addresses for internal
traffic and a second set for external traffic.
NIC (Network Interface Card):
An
expansion card connected to a computer
so the computer can be connected to a
network.
Packet:
A block of data that is transferred
as a single unit, also called a frame or a
block.
Packet Filtering:
Discarding unwanted
network traffic based on its originating
address or its type.
PCI (Peripheral Component Interconnect):
A bus that is connected directly to the
CPU.
PCMCIA (Personal Computer Memory Card
International Association) Card:
Removable
module that adds features to a portable
computer.
Glossary
