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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.
Ping (Packet Internet Groper):
An Internet
utility used to determine whether a
particular IP address is online.
Plug and Play:
Hardware that,
once installed (“plugged in”), can
immediately be used (“played”), as
opposed to hardware that requires
manual configuration.
PoE (Power over Ethernet):
A mechanism
to send DC power to a device using a
CAT5 Ethernet cable.
PPPoE (Point-to-Point Protocol over
Ethernet):
A specification for
connecting users on an Ethernet line
to the Internet through a common
broadband medium.
Protocol:
A standard way of
exchanging information between
computers.
RADIUS (Remote Authentication Dial In
User Service):
A server that issues
authentication key to clients.
RAM (Random Access Memory):
Non-
permanent memory.
Repeater Hub:
A device that collects,
strengthens and transmits information
to all connected devices, allowing
the network to be extended to
Glossary
