computers test 4

background
programs that are running but not in use
foreground
programs with which the user currently is interacting
bandwidth
the amount of data, instructions, and information that can travel over transmission media
latency
the time it takes a signal to travel from one location to another on a network
battery usage
benchmark test
test that measures the performance of hardware or software
booting
the process of starting or restarting a computer or mobile device
bug
error in a program
client operating systems
desktop operating systems that work in conjunction with a server operating system
client server networks
network in which one or more computers act as a server, and the other computers on the network request services from the server
coaxial cable
physical transmission media that consists of a single copper wire surrounded by at lest three layers
1)an insulating material
2)a woven or braided metal
3)a plastic outer coating
command line interface
User interface in which users type commands represented by short keywords or abbreviations or press special keys on the keyboard to enter data and instructions
Cross platform application
an application that runs the same on multiple operating systems
Dedicated server
perform s specific service and can be placed with other dedicated servers to perform multiple services
dial up modem
a communication device that converts digital signals to analog signals and analog signals to digital signals, so that data can travel along an analog phone line
disc cleanup
tool that searches for and removes unnecessary files
DSL
(Digital Subscriber Line) broadband internet connection provided through the telephone network via a DSL modem
DSL modem
a broadband modem that sends digital data and information from a computer to a DSL line and receives digital data and information from a DSL line
Fiber optics cables
physical transmission media that consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals
file compression
tool that shrinks the size of a file
GPS receiver
A handheld, mountable, or embedded device that contains an antenna, a radio receiver, and a processor
Hibernate mode
computer power option that saves any open documents and running programs or apps to an internal hard drive before removing power from the computer or device
host
any computer that provides services and connections to other computers on a network, also called a server
hot spot
a wireless network that provides internet connections to mobile computers and devices
hub/switch
a device that provides a central point for cables in a network
internet explorer
microsoft’s browser
internet
a worldwide collection of computer networks that connects millions of businesses, gov’t agencies, educational institutions, and individuals.
IP hijacking
one of the largest internet security threats, where cyberthieves tap into home routers or cable modems and can use the connection to commit illegal acts
IrDA
Infrared data association: standard to transmit data wirelessly to each other via infrared light waves
Modem
A device or program that enables a computer to transmit data over transmission lines such as telephone or cable: __
Network Architecture
the configuration of computers, devices, and media in a network
Noise
an electrical disturbance that can degrade communications
peer to peer network
a simple, inexpensive network that typically connects fewer than 10 computers
Power supply
component of the system unit converts wall outlet AC power to the DC power that is used by a computer
Proprietary software
software that is privately owned and limited to a specific vendor or computer or device model
protocol
a standard that outlines characteristics of how two devices communicate on a network
queue
(information processing) an ordered list of tasks to be performed or messages to be transmitted
Receiving device
device that accepts the transmission of data, instructions, or information
ring network
a network topology in which a cable forms a closed loop, with all computers and devices arranged along it
router
a communications device that connects multiple computers or other routers together and transmits data to its correct destination on a network
sending device
device that initiates an instruction to transmit data, instructions, or information
single user
often used by embedded computers
single tasking
allows only one program or app to run at a time
embedded computers
a special purpose computer that functions as a component in a larger product
skydrive
microsoft’s cloud server