Glossary - 5

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 computer 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.
IPX/SPX. Internet Package Exchange/Sequential Packet Exchange. A communications protocol for Novell. IPX
is Novell’s Layer 3 protocol, similar to XNS and IP, and used in NetWare networks. SPX is Novell's version
of the Xerox SPP protocol.
IS-95. Interim Standard 95. The EIA/TIA standard that governs the operation of CDMA cellular service. Versions
include IS-95A and IS-95B. See CDMA.
K
Key. A key is the specific code used by the algorithm to encrypt or decrypt the data. Also see, Encryption and
Decrypting.
L
laser scanner. A type of bar code reader that uses a beam of laser light.
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 co herent
and has a high energy density.
LCD. See Liquid Crystal Display.
LED Indicator. A semiconductor diode (LED - Light Emitting Diode) used as an indicator, often in digital
displays. The semiconductor uses applied voltage to produce light of a certain frequency determined by the
semiconductor's particular chemical composition.
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.
Light Emitting Diode. See LED.
M
MDN. Mobile Directory Number. The directory listing telephone number that is dialed (generally using POTS) to
reach a mobile unit. The MDN is usually associated with a MIN in a cellular telephone -- in the US and
Canada, the MDN and MIN are the same value for voice cellular users. International roaming considerations
often result in the MDN being different from the MIN.