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Glossary
88 1/1551-CRH 102 168 Uen Rev A 2008-12-16
is used by PPP and almost all network
operating system remote servers support
PAP. PAP transmits unencrypted ASCII
passwords over the network and is therefore
considered insecure, it is used as a last resort
when the remote access server does not
support a stronger authentication protocol,
such as CHAP.
Passphrase
A secret password used for WPA and WPA2
wireless data encryption. The encryption is
based on a WPA master key that is derived
from the passphrase and the network name
(SSID).
PC – Personal Computer
A computer designed for use by one person
at a time.
Port
In TCP and UDP networks, an endpoint to a
logical connection. The port number identifies
what type of port it is. For example, port 80 is
used for HTTP traffic.
PIN – Personal Identification Number
A secret code used for individual access to
for example computer networks. Generally, a
PIN is made up of 4 to 10 digits.
PPP – Point-to-Point Protocol
A protocol for serial data transmission that is
used to carry IP (and other protocol) data
between the service provider and your
computer.
Private IP Address
A private IP Address is typically assigned to a
client on a LAN and is not used outside the
LAN. Private IP addresses are typically used
when multiple computers share the same
Internet connection.
Protocol
A set of rules governing the transmission of
data. In order for a data transmission to work,
both ends of the connection have to follow the
rules of the protocol.
PSTN – Public Switched Telephone
Network
The traditional, wired telephone network
designed primarily for voice traffic.
Public IP Address
A public IP address is a globally unique
number that identifies a device on the
Internet. Anyone on the Internet can connect
to the device using the public address.
PUK – Personal Unblocking Key
A secret code made up of 8 to 10 digits. The
PUK is used to reactivate a SIM card that has
been blocked.
Roaming
The movement between microcells in a radio
network. Roaming service is used to provide
network access independent of where the
user resides and what service provider that is
running the network.
Routing
The forwarding of data between a local
network and the Internet on the most efficient
route, based on the data’s destination IP
address and current network conditions. A
device that performs routing is called a router.
RSSI – Received Signal Strength Indicator
The RSSI is an indicator of the strength of the
received radio signal.
SIM – Subscriber Identity Module
The “smart card” required by all mobile
customers to operate their phones. Carries
authentication, billing and information about
the individual subscriber, as well as address
book and other personalized information.
SMB – Server Message Block
An application-level network protocol mainly
applied to shared access to files, printers,
serial ports, and miscellaneous
communications between nodes on a
network. SMB was later renamed to CIFS
(Common Internet File System) with more