Datalogic MEMOR 20 User Manual page 100

CONTENTS
Host
A computer that serves other mobile computers in a network, providing services such as
network control, database access, special programs, supervisory programs, or program-
ming languages.
IEC
International Electrotechnical Commission. This international agency regulates laser
safety by specifying various laser operation classes based on power output during oper-
ation.
IEEE 802.11
A set of standards carrying out wireless local area network (WLAN) computer communi-
cation in the 2.4, 3.6 and 5 GHz frequency bands. They are created and maintained by
the IEEE LAN/MAN Standards Committee.
IP
Internet Protocol. The IP part of the TCP/IP communications protocol. IP implements
the network layer (layer 3) of the protocol, which contains a network address and is
used to route a message to a different network or subnetwork. IP accepts "packets"
from the layer 4 transport protocol (TCP or UDP), adds its own header to it and delivers
a "datagram" to the layer 2 data link protocol. It may also break the packet into frag-
ments to support the maximum transmission unit (MTU) of the network.
IP Address
(Internet Protocol address) The address of a computer attached to an IP network. Every
client and server station must have a unique IP address. A 32-bit address used by a com-
puter on a IP network. Client workstations have either a permanent address or one that
is dynamically assigned to them each session. IP addresses are written as four sets of
numbers separated by periods; for example, 204.171.64.2.
LAN
Local area network. A radio network that supports data communication within a local
area, such as within a warehouse of building.
Laser
Light Amplification by Stimulated Emission of Radiation.The laser is an intense light
source. Light from a laser is all the same frequency, unlike the output of an incandescent
bulb. Laser light is typically coherent and has a high energy density.
Laser Diode
A gallium-arsenide semiconductor type of laser connected to a power source to gener-
ate a laser beam. This laser type is a compact source of coherent light.
Light Emitting Diode (LED)
A low power electronic light source commonly used as an indicator light. It uses less
power than an incandescent light bulb but more than a Liquid Crystal Display (LCD).
Liquid Crystal Display (LCD)
A display that uses liquid crystal sealed between two glass plates. The crystals are
excited by precise electrical charges, causing them to reflect light outside according to
their bias. They use little electricity and react relatively quickly. They require external
light to reflect their information to the user.
MIL
1 mil = 1 thousandth of an inch.
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MEMOR™ 20