P314 Broadband Sharing Gateway with 4-Port Switch
H Glossary of Terms
Glossary of Terms
10BaseT
The 10-Mbps baseband Ethernet specification that uses two pairs of twisted-pair
cabling (Category 3 or 5): one pair for transmitting data and the other for receiving
data.
ARP
Address Resolution Protocol is a protocol for mapping an Internet Protocol address (IP
address) to a physical machine address that is recognized in the local network.
Authenticity Proof that the information came from the person or location that reportedly sent it. One
example of authenticating software is through digital signatures.
Backbone
A high-speed line or series of connections that forms a major pathway within a
network.
Bandwidth
This is the capacity on a link usually measured in bits-per-second (bps).
Bit
(Binary Digit) -- A single digit number in base-2, in other words, either a 1 or a zero.
The smallest unit of computerized data.
Byte
A set of bits that represent a single character. There are 8 bits in a Byte.
CDR
Call Detail Record. This is a name used by telephone companies for call related
information.
CHAP
Challenge Handshake Authentication Protocol is an alternative protocol that avoids
sending passwords over the wire by using a challenge/response technique.
Client
A software program that is used to contact and obtain data from a Server software
program on another computer. Each Client program is designed to work with one or
more specific kinds of Server programs and each Server requires a specific kind of
Client. A Web Browser is a specific kind of Client.
Crossover
Ethernet cable
A cable that wires a pin to its opposite pin, for example, RX+ is wired to TX+. This
cable connects two similar devices, for example, two data terminal equipment (DTE) or
data communications equipment (DCE) devices.
CSU/DSU
Channel Service Unit/Data Service Unit. CSUs (channel service units) and DSUs (data
service units) are actually two separate devices, but they are used in conjunction and
often combined into the same box. The devices are part of the hardware you need to
connect computer equipment to digital transmission lines. The Channel Service Unit
device connects with the digital communication line and provides a termination for the
digital signal. The Data Service Unit device, sometimes called a digital service unit, is
the hardware component you need to transmit digital data over the hardware channel.
The device converts signals from bridges, routers, and multiplexors into the bipolar
digital signals used by the digital lines. Multiplexors mix voice signals and data on the
same line.
DCE
Data Communications Equipment is typically a modem or other type of communication
device. The DCE sits between the DTE (data terminal equipment) and a transmission
circuit such as a phone line.
DHCP
Dynamic Host Configuration Protocol automatically assigns IP addresses to clients
when they log on. DHCP centralizes IP address management on central computers
