Lesson 24-25

Front 1

biometric security measures

Back 1

Examine a fingerprint, a voice pattern, or the iris or retina of the eye.

Front 2

cable modem

Back 2

A device that uses coaxial cable to send and receive data.

Front 3

client

Back 3

A computer that uses the services of another program.

Front 4

client/server network

Back 4

Computer configuration in which one or more computers on the network acts as a server.

Front 5

communication channels

Back 5

Link from one computer to another through which data can be transmitted.

Front 6

digital subscriber line (DSL)

Back 6

An Internet connection technology that provides for the transfer of information to a computer at a high-speed bandwidth over ordinary copper telephone lines.

Front 7

extranet

Back 7

A network configuration that allows selected outside organizations to access internal information systems.

Front 8

firewall

Back 8

A combination of hardware and software that creates a buffer between an internal network and the Internet to prevent unauthorized access.

Front 9

hacker

Back 9

Expert computer user who invades someone else's computer either for personal gain or simply for the satisfaction of being able to do it.

Front 10

hub

Back 10

A junction where information arrives from connected computers or periphereal devices and is then forwarded in one or more directions to other computer and devices.

Front 11

Internet

Back 11

The largest network used as a communication tool.

Front 12

intranet

Back 12

A network designed for the exclusive use of computer users within an organization that cannon be accessed by users outside the organization.

Front 13

local area network (LAN)

Back 13

A series of connected personal computers, workstationsm and other devices, such as printers or scanners, within a confined space, such as an office building.

Front 14

modem

Back 14

Communications hardware device that facilitates the transmission of data.

Front 15

node

Back 15

A device on the network.

Front 16

peer-to-peer network

Back 16

Computer architecture in which all of the coputers on a network are equal and there is no computer designated as the server.

Front 17

proxy server

Back 17

A server that acts as an intermediary between a user and the Internet.

Front 18

Public Switched telephone Network (PSTN)

Back 18

The world's collection of interconnected commerical and gov't owned voice- oriented systems.

Front 19

router

Back 19

A device that directs traffic on a network by dividing data into smaller packets that travel by different routes and then are reassembled at their destination.

Front 20

server

Back 20

A computer that handles requests for data, e-mail, file transfers, and other network services from other comouters (clients).

Front 21

server operating system

Back 21

High-end programs designed to provide network control and include special functions for connecting computers and other devices into a network.

Front 22

T-1 line

Back 22

A type of fiber-optic telephone line that can transmit up to 1.544 megabits per second or can be used to transmit 24 digitalized voice channels.

Front 23

wide area network (WAN)

Back 23

Computer network that covers a large geographical area. Most WANs are made up of several connected LANs.

Front 24

WiMAX

Back 24

A recent wireless technology that can deliver maximum speeds of up to 7 mbps to your cell phone, home computer, or car. Stanfs for Worldwide Interoperability for Microwave Access.

Front 25

wireless Internet service provider (WISP)

Back 25

An ISP that provides connection speeds more than 30 times faster than dial-up connections-from 384 Kbps to 2.0 Mbps.

Front 26

wireless LAN (WLAN)

Back 26

A variation of a LAN that uses no physical wires.

Front 27

Address Book

Back 27

Part of most e-mail programsl used to keep a list of contacts and their e-mail addresses.

Front 28

archiving

Back 28

Saving or transfering data to a storage device or folder for the purpose of saving space of organizing the data.

Front 29

attachment

Back 29

A document, image, figure, or other file that you can attach to an e-mail message.

Front 30

distribution list

Back 30

A list of e-mail address you can use to send the same message to a group.

Front 31

electronic mail (e-mail)

Back 31

Transmission of electronic messages over networks.

Front 32

e-mail address

Back 32

an email address identifies an email box which email messages are delivered.

Front 33

instant messaging

Back 33

A form of electronic communication that allows you to send and receive text messages in "real time" from friends and colleagues who are currently online.

Front 34

mailing list

Back 34

See distribution list.

Front 35

packets

Back 35

Units of data sent accross a network. When a large block of information is sent, it is broken up into smaller data packets that are sent separately and then reassembled in their origianl order at the other end.

Front 36

signature

Back 36

Text or graphics added to the end of outgoing e-mail messages.

Front 37

spam

Back 37

Unsolicited commerical e-mail that is sent to many people at the same time to promote products or services; also called junk e-mail.

Front 38

text messaging

Back 38

Using a cell phone or other mobile device to send and receive written messages.

Front 39

user agent

Back 39

A software application installed on the local PC, network, or Web, such as e-mail, text message, and instant messaging programs.

Front 40

Windows Mail

Back 40

E-mail software provided with Windows Vista.