P314 Broadband Sharing Gateway with 4-Port Switch

 

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

A cable that wires a pin to its opposite pin, for example, RX+ is wired to TX+. This

Ethernet cable

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

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Glossary of Terms