Appendices
39
time.
DNS (Domain Name System):
Helps route network traffic by making the addressing
process more user-friendly.
DHCP (Dynamic Host Configuration Protocol):
How devices obtain IP addresses
from a server.
DUN (Dial-Up Network):
Windows component that enables online access via a
modem.
EDGE (Enhanced Data GSM Environment/Enhanced Data for Global Evolution):
Advanced GPRS that delivers multimedia and other data needing greater
bandwidth at up to 237 kbps.
GPRS (General Packet Radio Service):
Delivers data in packets at up to 86 kbps.
GSM (Global System for Mobile Communications):
The most popular cellular
network, mostly operates in 850-900 or 1800-1900 MHz; the primary 2G system.
HSDPA (High Speed Downlink Packet Access):
Advanced WCDMA that delivers
downlink bandwidth intensive data at up to 7.2Mbps; typically associated with
3.5G.
HSUPA (High Speed Uplink Packet Access):
Advanced WCDMA that delivers
uplink bandwidth intensive data at up to 5.76Mbps; typically associated with
3.75G.
HSPA+ (High Speed Packet ):
This is also known as HSPA Evolved, is the
next step and is more focused on delivering data services enabling speeds of up
to 42Mbps in the downlink and 11Mbps in the uplink.
IMEI (International Mobile Equipment Identity):
A number unique to each
GSM/UMTS device that can be used block network access by a stolen mobile
device.
IP (Internet Protocol):
Routes packets over a network.
Kbps (Kilobits per second):
A data flow measure; 1024 bits/second.
LAN (Local Area Network):
A data network with limited range but good bandwidth.
Mbps (Megabits per second):
A data flow measure; 1,048,576 bits/second.
PAP (Password Authentication Protocol):
The difference between PAP
authentication and a manual or scripted login, is that PAP is not interactive. The
username and password are entered in the client's dialing software and sent as
one data package as soon as the modems have established a connection, rather
than the server sending a login prompt and waiting for a response.
PPP (Point-to-Point Protocol):
An internet connection method.
PIN (Personal Identity Number):
Four to eight digital numbers SIM card security
code; allows access to the carrier’s network.
Rx:
Shorthand for Reception.
SIM (Subscriber Identity Module):
A small card that contains key mobile device
identification, subscription and contact information.
Tx:
Shorthand for Transmission.
