computer concepts computer information systems. course competencies explain the functions of...
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COMPUTER CONCEPTSComputer Information Systems
COURSE COMPETENCIES
Explain the functions of computer system components.
Describe the information processing cycle.Describe various computer input & output devices.Describe various auxiliary storage devices.Describe wireless and mobile devices.Identify basic networking components.
FUNCTIONS OF COMPUTER SYSTEM COMPONENTS
PROCESSOR
Central Processing Unit (CPU)
Brain of a computer Executes program
instructions
MEMORY
Main Memory / Primary Storage
Used during information processing cycle
Lost when computer powers off
INPUT DEVICES
Any peripheral (piece of hardware equipment) used to provide data to the computer
Mouse, keyboard, camera, scanner
OUTPUT DEVICES
Any piece of hardware used to communicate the results of data processing
Speakers, printer, monitor
STORAGE
Secondary Storage Not directly
accessible by CPU External hard drive,
USB flash drive, memory card
INFORMATION PROCESSING CYCLE
PARTS OF THE INFORMATION PROCESSING CYCLE
InputProcessStorage
Output
ROLE IN THE INFORMATION CYCLE
Data is entered
Changes, computations, save for future
Communicate results
WHAT IS THE PURPOSE OF THE INFORMATION PROCESSING CYCLE AS IT RELATES TO COMPUTER SYSTEMS?
The main function of a computer system is to process information.
INPUT, OUTPUT, ANDSTORAGE DEVICES
CD / DVD
Storage device Optical disk – uses
light / lasers Often used for music,
text files, and photos Read-only vs.
rewritable
EXTERNAL HARD DRIVE
Storage Stores large data sets Connects by USB port
USB FLASH DRIVE
Storage device Convenient &
portable Fast! Easy to erase /
rewrite
KEYBOARD
Input device Used to enter text
information into the computer
MICROPHONE
Input device Records sound &
digitizes it to be stored in the computer for playback
MONITOR
Output device Provides a visual
display from the computer
MOUSE
Input device Handheld pointing
device that controls the on-screen cursor
PRINTER
Output device Produces a computer
image on paper InkJet vs. LaserJet
SCANNER
Input device Images a printed
page or graphic by digitizing it
SPEAKERS
Output device Converts electric
current into sound format
TOUCH SCREEN
Input & output device Touch-sensitive
display screen on which a user can make choices by pressing button images
WIRELESS & MOBILE DEVICES
WIRELESS & MOBILE DEVICES
Laptop Small, mobile personal computer that runs on a single battery or AC/DC adapter
PDAPersonal Digital Assistant; used for calculations, clocks, calendars, games, Internet, email, radio, etc.; characterized by touch screens
TabletNotebook- or Slate-shaped mobile computer; touch screen operated with a stylus or digital pen
Smartphone
Integrates the functionality of a mobile phone with a PDA
BASIC NETWORKING COMPONENTS
SERVER
Computer designed to process requests and deliver data to other computers over a local network or the Internet
Central repository of data and various programs that are shared by other users in a network
NETWORK INTERFACE CARD (NIC)
Expansion card that enables a computer to connect to a network
Most computers now have built-in NICs
ROUTER
Join multiple networks together
Able to filter traffic by analyzing IP addresses of senders and receivers
SWITCH
Joins multiple computers together within one local area network
Inspects data and determines the source & destination
FIREWALL
Protects a computer network from unauthorized access
Also limit access to the outside from internal users
QUESTIONS?
EXIT TICKET!
3 different input devices 2 auxiliary storage devices 1 basic networking component
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