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Published byOliver Joseph Modified over 9 years ago
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COMPUTER CONCEPTS Computer Information Systems
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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.
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FUNCTIONS OF COMPUTER SYSTEM COMPONENTS
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PROCESSOR Central Processing Unit (CPU) Brain of a computer Executes program instructions
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MEMORY Main Memory / Primary Storage Used during information processing cycle Lost when computer powers off
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INPUT DEVICES Any peripheral (piece of hardware equipment) used to provide data to the computer Mouse, keyboard, camera, scanner
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OUTPUT DEVICES Any piece of hardware used to communicate the results of data processing Speakers, printer, monitor
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STORAGE Secondary Storage Not directly accessible by CPU External hard drive, USB flash drive, memory card
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INFORMATION PROCESSING CYCLE
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PARTS OF THE INFORMATION PROCESSING CYCLE Input Process Storage Output
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ROLE IN THE INFORMATION CYCLE Data is entered Changes, computations, save for future Communicate results
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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.
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INPUT, OUTPUT, AND STORAGE DEVICES
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CD / DVD Storage device Optical disk – uses light / lasers Often used for music, text files, and photos Read-only vs. rewritable
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EXTERNAL HARD DRIVE Storage Stores large data sets Connects by USB port
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USB FLASH DRIVE Storage device Convenient & portable Fast! Easy to erase / rewrite
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KEYBOARD Input device Used to enter text information into the computer
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MICROPHONE Input device Records sound & digitizes it to be stored in the computer for playback
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MONITOR Output device Provides a visual display from the computer
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MOUSE Input device Handheld pointing device that controls the on-screen cursor
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PRINTER Output device Produces a computer image on paper InkJet vs. LaserJet
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SCANNER Input device Images a printed page or graphic by digitizing it
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SPEAKERS Output device Converts electric current into sound format
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TOUCH SCREEN Input & output device Touch-sensitive display screen on which a user can make choices by pressing button images
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WIRELESS & MOBILE DEVICES
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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
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BASIC NETWORKING COMPONENTS
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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
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NETWORK INTERFACE CARD (NIC) Expansion card that enables a computer to connect to a network Most computers now have built-in NICs
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ROUTER Join multiple networks together Able to filter traffic by analyzing IP addresses of senders and receivers
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SWITCH Joins multiple computers together within one local area network Inspects data and determines the source & destination
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FIREWALL Protects a computer network from unauthorized access Also limit access to the outside from internal users
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QUESTIONS?
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EXIT TICKET! 3 different input devices 2 auxiliary storage devices 1 basic networking component
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