CPS 111 � Introduction to Information Communication Technology

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					   CPS 111 – Introduction to
 Information Communication
         Technology


            Lecture 3

NETWORKS, Keyboard, & Mouse
Lecturer: Mr. B. SINGHATEH


                               1
 Review

  • Hardware and software

 Cont. functions of personal computer
  • Networks
 Basic control of input devices

  • Introduction to the Computer Desktop
  • Keyboard
  • Mouse

                                           2
 Telecommunications   is the exchange
 of information in any form (voice,
 data, text, image, audio, video) over
 computer based networks
 • Entertainment  Information Transactions 
   Communications
 • E.g. High-definition TV  Distance learning
   Cellular systems



                                                 3
When computers are networked, two industries –
computing and communications – converge, and
the result is vastly more than the sum of the
parts. Suddenly, computing applications become
available for business-to-business coordination
and commerce, and for small as well as large
organizations.
The global Internet creates a public place
without geographic boundaries – cyberspace –
where ordinary citizens can interact, publish
their ideas, and engage in the purchase of goods
and services. In short, the impact of both
computing on our society and organizational
structures is greatly magnified.
                                                   4
 Systems  which are being used to
 network business processes and
 employees together and connect them
 to their customer, suppliers and other
 business stakeholders:
 •   Internet
 •   Web
 •   Intranets
 •   Extranets


                                          5
 The  Internet is a massive network of networks,
  a networking infrastructure
 It connects millions of computers together
  globally, forming a network in which any
  computer can communicate with any other
  computer as long as they are both connected to
  the Internet
 Information that travels over the Internet does
  so via a variety of languages known as
  protocols

                                                    6
   The explosive growth of the Internet is a
    revolutionary phenomenon in computing and
    telecommunications
   Thousands of business, educational, and research
    networks now connect millions of computer
    systems
   The Internet does not have a central computer
    system. Instead each message sent has a unique
    address code so any Internet server in the network
    can forward it to its destination
     • No headquarters - International advisory and
       standards groups of individual and corporate
       members promote use of the Internet and the
       development of new communications standards
                                                         7
   The Web is a way of accessing information over the
    medium of the Internet
     • An information-sharing model that is built on top of
       the Internet
   The Web uses the HTTP protocol, only one of the
    languages spoken over the Internet, to transmit data
     • Web services, which use HTTP to allow applications
       to communicate in order to exchange business logic,
       use the Web to share information
   The Web also utilizes browsers, such as Internet
    Explorer or Firefox, to access Web documents called
    Web pages that are linked to each other via hyperlinks
     • Web documents also contain graphics, sounds, text
       and video
                                                              8
 The Internet, not the Web, is also used
 for e-mail, which relies on
 SMTP, Usenet news groups, instant
 messaging and FTP

 The Web is just a portion of the
 Internet, albeit a large portion, but the
 two terms are not synonymous but are
 often confused and used
 interchangeably
                                             9
 The most popular Internet
  applications are e-mail, instant
  messaging, browsing sites on the
  Web, and participating in
  newsgroups and chat rooms
 You can make online searches for
  information at websites using
  search engines such as Google
  and Yahoo!
                                     10
 Generate   new revenue from online
  sales
 Reduce costs of doing business
 Develop new web-based products
 Increase customer loyalty and
  retention
 Attract new customers
 Develop new markets and channels



                                       11
   A network inside of an organization that uses
    Internet technologies to provide an Internet-like
    environment within the enterprise
     • Information sharing
     • Communication
     • Collaboration
     • Support of business processes
   Is protected by passwords and encryption and can
    only be accessed by authorized users via the
    Internet
   Business value
     • Collaboration and communication
     • Web publishing
     • Business operations and management
                                                        12
   Extranets are network links that use Internet
    technologies to interconnect the intranet of a
    business with the intranets of its customers,
    suppliers or other business partners
   Business value
     • Speed and ease of access to intranet resources
     • Enables a company to offer new kinds of
       interactive web-based services to their
       customers
     • Improved collaboration



                                                        13
 WAN   (Wide area networks):
  Connecting a large geographic
  area such as a city
 LAN (Local area network): Connect
  within a limited physical area
  such as an office
 VPN (Virtual private network): A
  secure network that uses the
  Internet to connect participating
  organizations
                                      14
                                                 Shared
                                                Databases
                                                   and
    PC            PC            PC              Software
Workstation   Workstation   Workstation         Packages



                                          Network
                                           Server
                                                    Shared
                                                    Printer
    PC            PC            PC
Workstation   Workstation   Workstation   Internetwork
                                          Processor to
                                              Other
                                            Networks
                                                            15
                      computers (end
 Client/server: Client
 user PC) are interconnected by LANs
 and share application processing with
 network servers, which also manage
 the networks
  • Have become the predominant information
   architecture of enterprise wide computing
 Peer-to-peernetworking: The file-
 sharing software in the P2P network
 connects your PC with one of the
 online users in the network
                                               16
   Twisted-pair wire: Ordinary telephone wire,
    consisting of copper wire twisted into pairs in the
    most widely used medium for
    telecommunications
   Coaxial cable: Are you in high-service
    metropolitan areas and many office buildings for
    LANs
   Fiber optics: Cables consisting of one or more
    hair-this filaments of glass fiber wrapped in a
    protective jacket
     • About 100 times greater that coaxial cables and
       1,000 times better than twisted-pair wire

                                                          17
 Relyon radio wave, microwave,
 infrared, and visible light pulses to
 transport digital communications
  • Terrestrial microwave
  • Communications satellites
  • Cellular and pcs systems
  • Wireless LANs
  • The wireless web


                                         18
                                            Wireless
                                             Access
                                            Protocol
                                                      Mobile
                                     Wireless
 Web        Filter      Proxy                      Information
                                  Communication
Server    Software     Software                     Appliance
                                      Tower
                                                    (e.g. PDA)

      HTML           WML
     or XML

         Foundation of wireless mobile Internet
                 and Web applications                       19
 Modems: Convert   digital signal from a
 computer or transmission terminal at
 one end of a communications link to
 analog frequencies that can be
 transmitted over telephone lines
 • A modem at the other end converts the
   transmitted data back into digital form
 • Most common type of communications
   processor

                                             20
 Internetwork processors:
   • Switches: Communications processor that
    makes a connections between
    telecommunication circuits and networks
  • Routers: Interconnects networks based on
    different rules so a message can be routed to
    its destination
  • Hubs: Port (connection for shared access to
    networks resources) switching
    communications processor
  • Gateways: Connect networks that use
    different communications architecture
                                                    21
 Major network management
 functions:
 • Traffic management
 • Security
 • Network monitoring
 • Capacity planning




                             22
 Review


  • Hardware and software
 Cont. functions   of personal
 computer
  • Networks
 Basic control of input devices
  • Introduction to the Computer Desktop
  • Keyboard
  • Mouse

                                           23
          In graphical computing, a desktop
           environment (DE) commonly refers to a
           style of GUI that is based on the desktop
           metaphor (seen on most modern PCs)


Computer
Desktop
using
Microsoft
Windows
2007 Starter
Operating
System


                                                       24
   A desktop environment typically
    consists of:
    •   Icons
    •   Taskbar
    •   Windows
    •   Folders
    •   Wallpapers
    •   Shortcuts
    •   Desktop widgets
    •   Toolbars

                                      25
    1




    2


1
 An icon is a small pictogram which may represent
  a file, folder, application or device on a computer
  operating system
 A taskbar is a bar displayed on a full edge of a GUI desktop
2
  that is used to launch and monitor running applications
                                                                 26
   A window is a visual area containing some kind of user
    interface. It usually has a rectangular shape
    • It displays the output of, and may allow input to, one or more
      processes
                                                                       27
   Folder, directory, catalog, or drawer, in computing, is a
    virtual container within a digital file system, in which
    groups of computer files and other folders can be kept and
    organized
                                                                 28
   Wallpaper (also desktop picture and desktop
    background) is an image used as a background on a
    computer screen, usually for the desktop of
    a graphical user interface                          29
   Desktop widgets are interactive virtual tools that
    provide single-purpose services
    • E.g. current weather, the time, a calendar, etc.
                                                         30
   A computer shortcut is a small file containing a
    target URI or the name of a target program file that
    the shortcut represents
    • A path between two points that is faster than the commonly
      used paths
                                                                   31
   A toolbar is a GUI widget on which onscreen
    buttons, icons, menus or other input or output
    elements are placed
                                                     32
 Review
  • Quiz solutions
  • Hardware and software
 Cont. functions of personal computer
  • Networks
 Basic control of input devices
  • Introduction to the Computer Desktop
  • Keyboard
  • Mouse


                                           33
   How can you control your computer? How can you
    tell it what you want to do now?

   You have to give it your command

   You deliver your command through the use of
    input devices

    • Keyboard
    • Mouse
    • Touch pad
    • Etc.

                                                     34
               Additional
                 Keys




Special Keys   Arrow   Number Pad
               Keys

                                35
36
A keyboard shortcut or hotkey is a
 finite set of one or more keys that
 invoke a software or operating system
 operation when triggered by the user
 • http://www.computerhope.com/shortcut.htm




                                              37
1.    Ctrl + C or Ctrl + Insert: Copy the highlighted text or
      selected item
2.    Ctrl + V or Shift + Insert: Paste the text or object that's in the
      clipboard
3.    Ctrl + Z and Ctrl + Y: Undo any change. Pressing Ctrl + Y
      would re-do the undo
4.    Ctrl + F: Open the Find in any program
5.    Alt + Tab or Alt + Esc: Quickly switch between open
      programs
6.    F1: Open help for the program you're in
7.    Ctrl + P: Print what's currently being viewed in programs such
      as Microsoft Word or your Internet browser
8.    Ctrl + Left arrow / Right arrow: Move the cursor one word at
      a time instead of one character at a time
9.    Ctrl + Home / End: Move the cursor to the beginning or end
      of a document.
10.   Page Up / Space bar and Page Down: Move that page one
      page at a time in that direction

                                                                           38
39
40
41
42
43
 Review
  • Quiz solutions
  • Hardware and software
 Cont. functions of personal computer
  • Networks
 Basic control of input devices
  • Introduction to the Computer Desktop
  • Keyboard
  • Mouse


                                           44
 What is a mouse?
  • A hand held pointing device

 An arrow is displayed on the screen
  which is called a pointer
 Performs four basic functions:
  •   Pointing
  •   Clicking (right and left)
  •   Double clicking
  •   Click and drag

                                        45
   When working with icons
    • Right Click (Click)  Select
    • Left Click  Icon options/management
    • Double-click  Open
   When working with buttons
    • Click  Open
   Click and drag
    • Move (icons) – pointer on icon, then click and
      hold
    • Multiple selection – pointer on blank space, draw
      a rectangle to cover icons


     When using the term “click” it assumed
     to reference the right click functionality
                                                          46
 What   are the four functions of a
               mouse?




                                       47
 Grasp the mouse firmly on both sides using
 the thumb and fourth or little finger and by
 cupping it in the palm of your hand

 Laythe mouse on a flat surface bracing it
 with the palm of your hand

 Restthe index finger over the left button and
 the middle finger over the right button


                                                  48
 The   pointer will be pointing up and to the
 left

 Practicemoving the mouse to the recycle
 bin and then holding it over the icon

 Move   your hand in a arc

 What happens if you lift your mouse off the
 table?

 Lookat the bottom of the mouse. What do
 you see?
                                                 49
 Place  your right/left hand toward the edge
 of the table. Curl the middle, fourth and
 little finger slightly under so that the index
 finger is pointed

 Practice “clicking”: Tap   your index finger
 once on the table

 Practice “double-clicking”: Tap   your index
 finger twice on the table

    practice this same exercise using the
 Now
 mouse
                                                  50
      on the start button (bottom left of the
 Click
 screen)

 Move the mouse away from the Start Menu
 and click once on a blank space on the
 desktop. What happens?

      once on the My Computer icon on the
 Click
 desktop. Do you see that the color changes?

      once on a blank space on the desktop.
 Click
 What happens to the color of the My
 Computer icon?
                                                51
 Move the mouse to the My Computer icon
 Double-click to open the icon
 Move the mouse to My Documents icon
 Double-click to open the icon
 Close the windows by clicking on the X within
  the small red box in the upper right hand corner
  of the window
 Move the mouse back to the My Documents icon
 Left-click on the icon. What happens?




                                                     52

				
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