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Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
Extended Learning Module E
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Extended Learning Module E

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Transcript

  • 1.
    • Extended Learning Module E
    • Network Basics
    • A great module on your CD.
  • 2. Presentation Overview
    • Peer-to-Peer Home Networks
    • Internet Access
    • Business Networks
    • LANs, MANs, WANs, and Communications Media
    • Communications Service Providers
  • 3. Introduction
    • Computer network - two or more computers connected so that they can communicate with each other and share information, software, peripheral devices, and/or processing power.
  • 4. Introduction Basic Principles of Networks
    • Each computer must have a network card.
    • A network has at least one connecting device.
    • There must be communications media connecting the network hardware devices.
    • Each computer must have software that supports the movement of information.
  • 5. Peer-to-Peer Home Network
    • Peer-to-peer network - a network in which a small number of computers share hardware, software and/or information.
  • 6. Peer-to-Peer Home Network Home Network Components
    • Network interface card (NIC) - an expansion card or a PC Card that connects your computer to a network and provides the doorway for information to flow in and out.
  • 7. Peer-to-Peer Home Network Home Network Components
    • Ethernet card - the most common type of network interface card.
  • 8. Peer-to-Peer Home Network Home Network Components
    • Network hub - a device that connects multiple computers.
    • Switch - a device that connects multiple computers into a network in which multiple communications links can be in operation simultaneously.
    • Router - a device that acts as a smart hub connecting computers into a network, and it also separates your network from any other network it’s connected to.
  • 9. Peer-to-Peer Home Network Home Network Components
    • Firewall - software and/or hardware that protects a computer or network from intruders.
    • Cat 5, or Category 5 cable - a better-constructed version of the phone twisted-pair cable.
  • 10. Peer-to-Peer Home Network Wireless Access to Your Home Network
    • Wireless network access point or wireless access point - a device that allows computers to access a wired network using radio waves.
    • WiFi, Wireless Fidelity, or IEEE 802.11b - a way of transmitting information in wave form that is reasonably fast and is often used for notebooks.
    • Bluetooth technology - provides entirely wireless connections for all kinds of communication devices.
  • 11. Peer-to-Peer Home Network Home Network with Existing Phone Wiring
    • Home PNA (Home Phone line Networking Alliance) - allows you to network your home computers using telephone wiring.
    • PNA adapter card - an expansion card that you put into your computer to act as an doorway for information flowing in and out.
  • 12. Internet Access
    • Ways to Access the Internet at Home
    • Telephone line and a telephone or dial-up modem.
    • Telephone line and a Digital Subscriber Line (DSL) modem.
    • Cable TV line and a cable modem.
    • Satellite dish and a satellite modem.
    • Provider that offers wireless connection for your notebook.
  • 13. Internet Access Telephone or Dial-Up Connection
    • Broadband - a high-capacity telecommunications pipeline.
    • Telephone modem - a device that connects your computer to your phone line so that you can access another computer or network.
    • Digital Subscriber Line (DSL) - a high-speed Internet connection using phone lines, which allows you to use your phone for voice communications at the same time.
  • 14. Internet Access Cable Modem
    • Cable modem - a device that uses your TV cable to deliver an Internet connection.
    • Satellite modem - a modem that allows you to get Internet access from a satellite dish.
  • 15. Internet Access Wireless Internet Connection
    • Wireless Internet service provider (wireless ISP) - does the same job as standard Internet service providers except that you don’t need a wired connection for access.
  • 16. Internet Access Wireless Internet Connection
    • Personal digital assistant (PDA) - a small hand-held computer that helps you surf the Web and perform simple tasks such as note taking, calendaring, appointment scheduling, and maintaining an address book.
      • Palms and Handspring - run on the Palm Operating System
      • PocketPC s - run on Pocket PC OS
  • 17. Business Networks
    • Client/server network - a network in which one or more computers are servers and provide services to the other computers which are called clients .
  • 18. Business Networks Client/Server: A Business View
    • Client/server networks differ according to three factors:
      • Where the processing for the presentation of information occurs.
      • Where the processing of logic or business rules occurs.
      • Where the data management component (DBMS) and information (database) are located.
  • 19. Business Networks Client/Server: A Business View
  • 20. Business Networks Client/Server: A Business View Team Work What Sort of Computer Network Does Your School Have? (p. 12)
  • 21. Business Networks Client/Server: A Business View
    • The Five Models of Client/Server
    • Distributed Presentation
      • The server handles almost all functions, including a major portion of the presentation.
    • Remote Presentation
      • The client handles all presentation functions.
    • Distributed Logic
      • The server handles all data management and the client handles all presentation formatting, and the logic processing is shared.
  • 22. Business Networks Client/Server: A Business View
    • Remote Data Management
      • The server handles data management only, and the client processes business rules and formats the presentation of results.
    • Distributed Data Management
      • The client handles all presentation formatting and business rule processing, and both the server and client share data management duties.
  • 23. Business Networks Client/Server: A Business View On Your Own How Is a Server Different From a Client? (p. 18)
  • 24. Business Networks Client/Server: A Physical View
    • Communications protocol ( protocol ) - a set of rules that every computer follows to transfer information.
  • 25. LANs, MANs, WANs, and Communications Media Classification of Networks by Geographic Distance
    • Local area network (LAN) - covers a limited geographic distance, such as an office, building, or a group of buildings in close proximity to each other.
    • Municipal area network (MAN) - covers a metropolitan area.
    • Wide area network (WAN) – covers a large geographic distances, such as a state, a country, or even the entire world.
  • 26. LANs, MANs, WANs, and Communications Media Telecommunications Media: The Paths That Carry Information
    • Communications media - the paths, or physical channels, in a network over which information travels.
    • Wired communications media - transmit information over a closed, connected path.
    • Wireless communications media - transmit information through the air.
  • 27. LANs, MANs, WANs, and Communications Media Telecommunications Media: The Paths That Carry Information
    • Wired Communications Media include:
      • Twisted-pair cable
      • Coaxial cable
      • Optical Fiber
    • Wireless Communications Media Include:
      • Microwave
      • Satellite
      • Infrared
  • 28. LANs, MANs, WANs, and Communications Media Bandwidth
    • Bandwidth - refers to the amount of information that a communications medium can transfer in a given amount of time.
  • 29. LANs, MANs, WANs, and Communications Media Wired Communications Media
    • Twisted pair (phone cabling) provides a slow, fairly reliable path for information.
    • Coaxial cable (coax) - one central wire surrounded by insulation, a metallic shield, and a final case of insulating material.
    • Optical fiber - uses a very thin glass or plastic fiber through which pulses of light travel.
  • 30. LANs, MANs, WANs, and Communications Media Wireless Communications Media
    • Wireless communications media radiate information into the air.
    • Infrared - a wireless communications medium that uses radio waves to transmit signals or information.
    • Microwave transmission - a type of radio transmission.
      • Bluetooth
      • WiFi
  • 31. LANs, MANs, WANs, and Communications Media Directional Microware for Medium Distances
    • Repeater - a device that receives a radio signal, strengthens it and sends it on.
    • Communications satellites - microwave repeaters in space.
  • 32. Communications Service Providers
    • Communications service providers - third parties who furnish the conduit for information.
  • 33. Communications Service Providers
    • Public network - a network on which your organization competes for time with others.
    • Private network - communications media that your organization owns or exclusively leases to connect networks.
    • Value-added network (VAN) - a semipublic network that provides services beyond the movement of information.
    • Virtual private network (VPN) – uses software to establish a secure channel on the Internet for transmitting data.
  • 34. Communications Service Providers Key Considerations for Communications Media
    • To determine the most appropriate communications medium, you must consider:
      • Capacity
      • Reliability
      • Cost
      • Distance
      • Mobility
    Team Work What’s the Big Deal with Frequencies? (p. 23)
  • 35. Summary Assignments & Exercises
    • Investigate cell phone technology
    • Find out about Personal Digital Assistants
    • What are the Internet access options in your area?
    • Investigate building your own home network
    • Investigate satellite radio

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