let the journey begin powerpoint presentation to accompany go! with computer concepts chapter 1...
TRANSCRIPT
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Let the Journey Begin
PowerPoint Presentation to Accompany
GO! with Computer Concepts
Chapter 1Basic Computer Concepts
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Objectives
1. Define Computer and Identify the Four Basic Computing Functions
2. Identify the Different Types of Computers
3. Describe Hardware Devices and Their Uses
4. Identify Types of Software and Their Uses
5. Describe Networks and Define Network Terms
6. Identify Safe Computing Practices
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Define Computer and Identify the Four Basic Computing Functions
• Computer – A programmable electronic device that can input, process,
output, and store data.
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–Components of a typical computer system
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Types of Computers
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Identify the Different Types of Computers
• Mainframe computers• Manage users through multitasking
• Supercomputers–Large, powerful and ultrafast–Process scientific calculations
and multi-scale simulations
• Mid-range computers
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Microcomputers
DesktopMac Laptop/notebook
Tablet Tablet Smartphone
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Hardware Devices and Their Uses• Hardware
–A computer and any connected equipment
• System Unit–Houses internal components–Provides connection sites for
peripheral devices• Peripheral devices provide input and
output
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Power supply
Processor and cooling fan
Expansion cards
Drive bays
The System UnitTHE PHYSICAL CASE
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Inside the System Unit
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Hardware Devices and Their Uses• System Board or Mother
Board
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What’s on the Motherboard?
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Drive Controller & InterfacesCONNECTS DISK DRIVES TO THE PROCESSOR
SATA cable
EIDE cable
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Hardware Devices and Their Uses• Central Processing Unit
(CPU)–The brain of the computer that
executes programs and manipulates data
–Many different types
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Manufacturers• Intel
– Core i3, i5, i7 (Duo or Quad)– Core Duo, Quad– Pentium – Basic computing
• Single processor
– Celeron – entry level computing– Centrino, Centrino 2 - mobile
• AMD– Athlon
• XP, 64, 64 X2, • Phenom, Phenom II, A6, A10
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What’s on the Motherboard?
• Multi-core processing – Access time reduced – Processing time improved– Each core handles incoming streams of data
or instructions at the same time– Two basic types:
• Dual core• Quad core
Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 17
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What’s on the Motherboard?
• System clockoElectronic circuit that produces rapid pulses
and coordinates the computer’s internal activities.
oClock speed—measurement of the electrical pulses generated by the system clock, usually measured in gigahertz (GHz)
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Hardware Devices and Their Uses• Memory
–Measured in bytes• megabytes (MB), gigabytes (GB)
–ROM: permanent and nonvolatile –RAM: temporary and volatile
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What’s on the Motherboard?
• RAM– Types of RAM:
• Dual inline memory modules (DIMM)—most common today
– 168-pin connector – 64-bit transfer rate
• Single inline memory modules (SIMM)—older technology
– 72-pin connector– 32-bit transfer rate
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Memory (RAM)
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What’s on the Motherboard?
• Read-only memory (ROM)– Contains prerecorded instructions to start the computer– Nonvolatile—contents stored when CPU power off
• Basic input/output system (BIOS)– First code run when the system is powered on
• Complementary metal-oxide semiconductor (CMOS)
– Starts the power-on self-test and verifies other system components are operating correctly
• Power-on self-test (POST)– Checks circuitry and RAM, marking defective locations
• Bootstrap loader– Program—locates and loads the operating system into RAM
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What’s on the Outside of the Box?
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What’s on the Outside of the Box?Connectors on a notebook may vary
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Hardware Devices and Their Uses
• Input Devices–Used to enter data into memory
(RAM).–Two most familiar:
• Mouse• Keyboard
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Recognize Input DevicesMobile Devices Equipped with Keyboard Options
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Recognize Input Devices• Pointing devices
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Input Devices: Giving Commands
• Keyboards– Connect with:
• Universal Serial Bus (USB) connector• PS/2 cable• Infrared • Radio frequency• Bluetooth
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Input Devices: Giving Commands
• Mice– Optical—most popular pointing device– Travel—all the capabilities of a normal mouse,
half the size– Wheel—has a wheel for easy vertical scrolling– Wireless—connects through an infrared or
radio signal (RF)– Air—does not need to work on a surface, works
as it moves through the air
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Hardware Devices and Their Uses• Output Devices: displays
information after data has been processed in a useful format.–Monitors–Printers–Speakers and multimedia
projectors
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Output Devices: Engaging Our Senses
• Monitors– Display a temporary copy (soft copy) of
processed data– LCD (flat-panel) display– LED (light emitting diode)
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Hardware Devices and Their Uses
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Output Devices: Engaging Our Senses
• Printers– Supply a hard copy of output displayed on
a computer’s monitor– Types include:
• Dot-matrix• Inkjet• Laser• Thermal-transfer (sometimes called dye
sublimation printers)• Photo• Plotters
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Hardware Devices and Their Uses• Output Devices: printers
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Objective 3: Hardware Devices and Their Uses
• Storage Devices– Used to store data, information, and
programs for future use.– Permanent memory– Storage device versus storage media
• Device – hardware such as hard drives or DVD drives
• Media – removable part that actually contains the stored data
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Objective 3: Hardware Devices and Their Uses
–Data is stored in one of three forms:• Magnetic• Optical• Flash
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Methods for Storing Data• Many types of recording media
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System Unit
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Hardware Devices and Their Uses
• Hard disk drive– 200GB to 3TB– 300GB – 500GB good range– 5400 rpm vs. 7200 rpm– Solid state (no moving parts)
• CD, DVD, BD (Blu-ray) drives– CD – 700MB – 1 GB– DVD – 4.7GB – 17GB– BD – 25GB/50GB
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Storage: Holding Data for Future Use
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Hardware Devices and Their Uses
• Flash drives–2 GB – 64GB
• USB–Hard drives
• Battery operated hard drive
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What’s on the Outside of the Box?
• Legacy technology– Older technology that is being phased out
• Examples:» Serial ports» Parallel ports» PS/2 ports » SCSI (small computer system interface)
ports
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Ports & ConnectorsCONNECT PERIPHERALS TO THE MOTHERBOARD
EthernetAudio PS/2Parallel
HDMI videoStandard (VGA) video
FireWire
USB
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USB FireWire
Ports & ConnectorsCONNECT PERIPHERALS TO THE MOTHERBOARD
USB Hub
Ethernet
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Protection• Surge protectors
• UPS
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Describe Hardware Devices and Their Uses
• Evaluating Your System–What kind of computer do you
have?• Computer > Properties
–Which operating system?–How much memory?–Drives and storage space?
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Identify Types of Software and Their Uses
• System Software–Contains two main programs:
• Operating System– Manages hardware components
• Utility programs– Small applications that handle tasks
involved with management and maintenance of a system.
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Identify Types of Software and Their Uses
• Operating System– Communicates with the computer and
its peripherals• Includes the user interface• Graphical User Interface (GUI)
– Icons– Menus– Dialog boxes– Windows
– contains the directions needed to start up the computer (known as the boot process)
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Identify Types of Software and Their Uses
• Windows Operating System–Windows XP–Windows Vista–Windows 7 –Windows 8
• Linux• Mac
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Utility Programs
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Identify Types of Software and Their Uses
• Application Software–Programs created to perform a
specific task or solve a specific need
–Fall into one of several categories• Financial and business• Graphics and multimedia• Educational and reference• Entertainment• Communication• Productivity software
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Identify Types of Software and Their Uses
–Productivity software• Word processing• Spreadsheet• Database• Presentation• Communication
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Describe Networks and Define Network Terms
• Networks– Consist of two or more connected
computers plus peripheral devices – Allow users to share data, software,
and resources – Each object connected to a network
is a node– Topology– Servers
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Describe Networks and Define Network Terms
• LAN– A network that connects computers
reasonably close together• WAN
– A network that covers a geographic area or begins to include other networks
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Describe Networks and Define Network Terms
• Network configurations–Peer-to-peer
• Most commonly found in homes and businesses• Each node communicates with every other node
without a dedicated server among computers.
–Client/Server• Typically have two different types of computers
– The client: used by an individual – The server: used by network technicians
and administrators to manage network resources
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Network Servers• Domain Controller
–Domain – used to group users and computers
• File Server• Print Server• Web Server• E-mail Server
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Describe Networks and Define Network Terms
• Network topologies – describes the different types of network architecture used for client/server networks.– Bus topologies – connects each node to a single,
central high-speed line known as a bus.– Ring topologies – connects each node to the next,
forming a loop.
– Star topologies – connects each node to a special
device known as a switch.
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Describe Networks and Define Network Terms
• Network topologies
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Identify Safe Computing Practices
• Computer Maintenance–Establish a regular maintenance
routine• Backup utilities• Disk Cleanup• Disk Defragmenter• Task Scheduler• System Restore
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Identify Safe Computing Practices• Viruses/Malware
– Malicious codes or software
• Worms– Malicious programs that spread from
computer to computer
• Trojan horses– Often appear to be a desirable
software program
• Phishing
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Identify Safe Computing Practices• Spyware
–Captures information on a computer
–Usually not intended to harm a computer• Adware • Cookies • Key loggers
• Social Engineering
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Identify Safe Computing Practices• Protecting Yourself and Your
Computer–Software updates and patches–Antivirus/Antispyware software
• Finds and removes viruses and spyware
• Personal firewalls–Software programs or hardware
devices• Can make computers invisible to hackers
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Identify Safe Computing Practices
• What else should you do to be safe online?– Do not give our personal information– Avoid spam email and phishing attacks
• Phishing is an email that masquerades as authentic organizations and ask for personal information
– Check for hoaxes and scams online– When in doubt, always check
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Updates and Firewall