User Manual

LAN (Local Area
Network)
Personal and other computers within a limited area that are linked by
high-performance cables so that users can exchange information, share
peripherals, and draw on programs and data stored in a dedicated
computer called a file server.
Ranging tremendously in size and complexity, LANs may link only a
few personal computers to an expensive, shared peripheral, such as laser
printer. More complex systems use central computers (file servers) and
allow users to communicate with each other via electronic mail to share
multi-user programs and to access shared databases.
Linux A version of the UNIX System V Release 3.0 kernel developed for PCs
with 80386 and higher-level microprocessors. Linux is distributed free
with source code through BBSs and the Internet, although some
companies distribute it as part of a commercial package with Linux-
compatible utilities. The Linux kernel works with the GNU utilities.
MAC (Media
Access Control)
On a LAN or other network, the MAC address is your computer’s unique
hardware number. (On an Ethernet LAN, it is the same as your Ethernet
address.) The MAC layer frames data for transmission over the network,
then passes the frame to the physical layer interface where it is
transmitted as a stream of bits.
Megahertz (MHz) A measure of frequency equivalent to 1 million cycles per second.
Modulation The conversion of a digital signal to its analog equivalent, especially for
the purposes of transmitting signals using telephone lines and modems.
Network
Any time you connect two or more computers together so that they can
share resources, you have a computer network. Connect two or more
networks together and you have an internet.
NIC (Network
Interface Card)
A board that provides network communication capabilities to and from a
computer system. Also called an adapter.
Node In LAN, a connection point that can create, receive, or repeat a message.
Nodes include repeaters, file servers, and shared peripherals. In common
usage, however, the term node is synonymous with workstation.
Packet A basic message unit for communication across a network. A packet
usually includes routing information, data and (sometimes) error detection
information.
PCMCIA
(Personal
Computer
Memory Card
International
Association)
Develops standards for PC Cards, formerly known as PCMCIA Cards.
They are available in three types that are about the same length and width
as credit cards but range in thickness from 3.3 mm (Type I) to 5.0 mm
(Type II) to 10.5 mm (Type III). These cards provide many functions,
including memory storage and acting as landline modems and as WLAN.
POP (Post Office
Protocol)
This is a common protocol used for sending, receiving and delivering mail
messages.