Cis Chapter 7

Front 1

connectivity

Back 1

concept related to using computer networks to link people and resources

Front 2

bluetooth

Back 2

allows wireless communication for nearby devices

Front 3

communication systems

Back 3

electronic systems that transmit data from one location to another

Front 4

communication channels

Back 4

carry data from one computer to another, physically or wireless

Front 5

physical connections

Back 5

use a solid medium such as twistedpair telephone lines, coaxial cable, and fiber-optic cable

Front 6

telephone lines - twisted pair

Back 6

cable of copper wires, being replaced by other media

Front 7

coaxial cable

Back 7

replaces twisted pair with a solid-copper core to provide higher transmission capacity

Front 8

fiber-optic cable

Back 8

transmits data as pulses of light. lighter and faster than coaxial cable

Front 9

microwave

Back 9

uses high frequency radio waves

Front 10

line-of-sight communication

Back 10

radio waves waves travel in a straight line

Front 11

satellite

Back 11

sends data long distances using rotating satellites above earth

Front 12

modems

Back 12

convert ditial signals to analog signals and convert analog to digital

Front 13

external modem

Back 13

outside the system cabinet connected by cable to the serial port

Front 14

internal modem

Back 14

card that plugs into a slot on the system board

Front 15

PC Card modem

Back 15

a credit card-size expansion board for portable computers

Front 16

wireless modem

Back 16

receives data through the air

Front 17

bandwidth

Back 17

a measure of a communication channel's capacity

Front 18

types of broadband

Back 18

voiceband, medium band, broadband

Front 19

protocols

Back 19

rules for exchanging data

Front 20

TCP/IP

Back 20

standard protocol for the internet with two essential features: IP address, packets

Front 21

IP addresses

Back 21

identify the computer on the internet, DNS converts text-based addresses to IP addresses

Front 22

packets

Back 22

part of a message that are sent separately over the internet

Front 23

node

Back 23

any device connected to a network

Front 24

client

Back 24

node requesting resources

Front 25

server

Back 25

node prodiving resources

Front 26

NOS

Back 26

network operating system

Front 27

distributing process

Back 27

system where processing is located and shared at different locations

Front 28

host computer

Back 28

large centralized computer

Front 29

network architecture

Back 29

describes how a computer network is configured

Front 30

topology

Back 30

ways computers are arranged

Front 31

star network

Back 31

each drive is linked to a central unit, control is maintained by polling, often used for time-sharing systems in which several users share resources of a central computer

Front 32

bus network

Back 32

ethernet, each device handles its own communications along a common connecting cable called a bus

Front 33

ring network

Back 33

each device is connected to two other devices forming a ring

Front 34

hierarchial network

Back 34

connects smaller computers to a central host, often used in distributed data processing systems

Front 35

strategy

Back 35

way of sharing information and resources

Front 36

terminal network system

Back 36

a centralized computer distributes power to several terminals

Front 37

peer-to-peer network system

Back 37

each computer acts as both a sever and a client

Front 38

client/sever network system

Back 38

client computers request resources forma server computer

Front 39

LANs

Back 39

connect devices that are located close to one another

Front 40

metropolitan area networks

Back 40

used to link office buildings within a city

Front 41

wide area networks, WANs

Back 41

largest type, span states and countries