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Published byOliver Joseph Modified over 8 years ago
COMPUTER CONCEPTS Computer 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 Input Process Storage 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, AND STORAGE 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
Laptop Small, mobile personal computer that runs on a single battery or AC/DC adapter PDA Personal Digital Assistant; used for calculations, clocks, calendars, games, Internet, email, radio, etc.; characterized by touch screens Tablet Notebook- 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
EXIT TICKET! 3 different input devices 2 auxiliary storage devices 1 basic networking component
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