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PCMCIA (Personal Computer Memory Card
International Association) Card: Removable
module that adds features to a portable
computer.
Peer-to-peer: This simple network is formed by
connecting computers directly, without use of
routers or hubs. A crossover cable is plugged
into an Ethernet port in each computer,
connecting them directly.
Ping (Packet Internet Groper): An Internet
utility used to determine whether a particular
IP address is accessable.
Plug and Play: Hardware that, once physically
installed, nishes its installation automatically
and may immediately be used, as opposed
to hardware that requires further manual
conguration.
PoE (Power over Ethernet): A mechanism
to send DC power to a device using a CAT5
Ethernet cable.
MHz (MegaHertz): One million cycles per
second.
NAT (Network Address Translation): An
internet standard that enables a LAN to
use one set of IP addresses for internal
trafc and a second set for external trafc.
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 trafc based on its originating
address or its type.
PCI (Peripheral Component
Interconnect): A bus that is connected
directly to the CPU.
Glossary