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Glossary
1/1551-CRH 102 168 Uen Rev A 2008-12-16
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Electronics Engineers
IEEE (pronounced I-tripleE) is an organization
composed of engineers, scientists, and
students. The IEEE is best known for
developing standards for the computer and
electronics industry. In particular, the IEEE
802 standards for local area networks are
widely followed.
IMEI – International Mobile Equipment
Identity
The IMEI number is a 15 digit numnber which
includes information on the origin, model, and
serial number unique to every mobile device.
The IMEI number is used by the mobile
network to identify valid devices.
IP – Internet Protocol
A part of a suite of protocols that effectively
defines the Internet as we know it. Specifies
addressing and control information for routing
data packets over networks.
IP address
The address of a host on the Internet,
consisting of four numbers, each from 0 to
255, separated by periods, for example
192.168.1.1. An IP address consists of a
network ID that identifies the particular
network the host belongs to, and a host ID
uniquely identifying the host itself on that
network. A network mask is used to define
the network ID and the host ID. See also
Private IP Address and Public IP Address.
LAN – Local Area Network
A computer network limited to the immediate
area, such as a home, office, or small
building.
Lease time
The amount of time that a dynamically
assigned IP address will be valid for a specific
device.
MAC address – Media Access Control
address
The permanent hardware address of a device
assigned by its manufacturer. MAC
addresses are expressed as six pairs of
hexadecimal characters (0-9 and a-f), with
each pair separated by colons. For example:
1a:2b:23:5b:66:9a
Mass Storage
Various techniques and devices used to store
large amounts of data. An example of a mass
storage device is a hard disk.
MBR – Mobile Broadband Router
A router providing residential and small office
users with broadband services like high-
speed data, voice, and fax connectivity.
Internet access is provided through the
mobile communications network.
NAT – Network Address Translation
A service performed by many routers that
translates a network’s IP address into a
private IP address for each device on the
LAN. Only the router and the LAN know these
addresses; the outside world sees only the
public IP address when talking to a computer
on the LAN.
Network mask
A sequence of bits applied to an IP address
to select the network ID while ignoring the
host ID. Bits set to 1 mean “select this bit”
while bits set to 0 mean “ignore this bit”. For
example, if the network mask 255.255.255.0
is applied to the IP address 100.10.50.1, the
network ID is 100.10.50, and the host ID is 1.
See also Subnet mask.
Packet
The units of data transmitted on a network.
Each packet contains a payload (the data),
plus overhead information such as where it
came from (source address) and where it will
go (destination address).
PAP – Password Authentication Protocol
PAP is a simple authentication protocol used
to authenticate a user to a remote access
server or Internet Service Provider (ISP). PAP