Hub: A device which allows connection of computers and other devices to form a LAN.
IEEE (Institute of Electrical and Electron- ics Engineers): The professional organi- zation which promotes development of electronics technology.
IP (Internet Protocol) Address: A unique
Infrastructure: A wireless network or other small network in which the wireless network devices are made a part of the network through the Access Point.
ISP (Internet Service Provider): A com- pany that provides access to the Internet and other related services.
IV (Initialization Vector): The header sec- tion of a message packet.
LAN (Local Area Network): A group of computers and peripheral devices con- nected to share resources.
LED (Light Emitting Diode): The lights on a hardware device representing the activ- ity through the ports.
MAC (Medium Access Control) Address: A unique number that distinguishes network cards.
Mbps (Mega Bits Per Second): A mea- surement 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 perfor- mance 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 traf- fic.
NIC (Network Interface Card): An expan- sion card connected to a computer so the computer can be connected to a network.
Packet: A block of data that is trans- ferred 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: Remov- able module that adds features to a portable computer.
Ping (Packet Internet Groper): An Internet utility used to determine whether a par- ticular IP address is online.
Plug and Play: Hardware that, once in- stalled (“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
Protocol: A standard way of exchanging information between computers.
RADIUS (Remote Authentication Dial In User Service): A server that issues au- thentication key to clients.
RAM (Random Access Memory):
Repeater Hub: A device that collects, strengthens and transmits information to all connected devices, allowing the network to be extended to accommodate additional workstations.
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