CIS300 Chapter 6

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CIS300 Chapter 6
2011-02-08 20:04:16

Business Networks and Telecommunications
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  1. a family of wireless protocols known as Wi-Fi (Wireless Fidelity)
    supports wireless communication within 100 meters of router
    IEEE 802.11
  2. connection between wireless device and a wired network

    allows Internet access within range of equipment
    Access point (hotspot)
  3. ability to scramble and encode messages through encryption keys that are shared only between the sender and receiver
  4. allows devices to communicate within 10 meters
    transmits voice and data
    considered a personal area network (PAN) technology
  5. increases range and speed of wireless communication

    works with metropolitan area networks (MANs)

    would enable Internet connection while in a moving vehicle
    Worldwide Interoperability for Microwave Access (WiMAX)
  6. similar to cell phone communications

    compatible with IP services, Wi-Fi, and Bluetooth

    would support WiFi routers on cell towers to allow use of VoIP by cell phones
    Mobile Broadband Wireless Access (MBWA)
  7. speed of receiving from network
  8. speed of transmitting to network
  9. data remains digital through entire transmission
    Digital subscriber line (DSL)
  10. point-to-point dedicated digital circuits provided by telephone companies
    T1 and T3 lines
  11. a free satellite service that provides location information
    Global positioning system (GPS)
  12. point-to-point transmission between two stationary devices, typically between buildings
    Fixed wireless
  13. when the optical fiber reaches the subscriber's living or work space
    Fiber to the Home (FTTH)
  14. provides services through optical fiber lines
    optical carrier (OC)
  15. uses Internet connection to conduct telephone conversations
    VoIP (Voice over Internet Protocol)
  16. networks with enhanced services offered by outisde vendors

    provide reliability, management, and maintenance of networks for an organization
    value-added networks (VANs)
  17. preferred method of conducting e-commerce

    less costly than VANs
    Internet service providers (ISPs)
  18. wireless network designed for handheld and personal devices

    used by one or two people, transmission speed is lower, maximum distance is about 10 meters
    Personal area network (PAN)
  19. connects a device to a hub, switch, bridge, router, which connects to a LAN or WAN
    Network interface card (NIC)
  20. central location to connect devices to LAN

    broadcasts all communications to all devices
  21. a hub that sends communications only to designated devices on the network
  22. connects two networks
  23. routes data packets to the next node on the path to the final destination
  24. translates communication signals from analog to digital and vice verse
  25. slower type of connection through modem, usually no faster than 56 Kbps
    dial-up connection
  26. can be an alternative to creating a LAN

    doesn't require leasing of lines

    utilizes the Internet, a public network, to stimulate a private network that only authorized users can access

    includes intranet and extranet
    Virtual private network (VPN)
  27. dedicated channel is established for the furation of the transmission
    circuit switching
  28. message broken into packets
    packet switching
  29. group of bits transmitted together
  30. high-speed packet-switching protocol used in WANs

    variable-sized packets routed quickly
    frame relay
  31. uses packets, but all packets are routed on the same path

    used for VoIP
    Multi-Protocol Label Switching (MPLS)
  32. set of rules governing communication between computers
  33. a set of related records
    Transmission Control Protocol/Internet Protocol (TCP/IP)
  34. highest speed channels
    Internet backbone
  35. a computer connected directly to a backbone
  36. unique numerical identificaton for a network device
    IP address
  37. associate a character-based name with an IP address
    Domain Name System (DNS)
  38. a permanent address assigned to a device
    static IP address
  39. temporary IP address assigned to a device for the duration of the connection
    dynamic IP address
  40. LAN protocol using coaxial or Cat 5 or Cat 6 twisted pair cable
  41. faster Ethernet connection of one Gbps or greater
    Gigabit ethernet
  42. transmitted images and speech
  43. enables rapid transactions and payments
    Radio Frequency Identification (RFID)
  44. used to locate and download files from any online computer through the Internet using applications
    Peer-to-Peer (P2P) file sharing
  45. speed at which data is communicated

    also called transmission rate or bit rate
  46. unit of measure for bandwidth
    bits per second (bps)
  47. communications medium that can carry onle one transmission at a time
  48. communications medium that can carry multiple transmissions simultaneously
  49. pairs of insulated copper wires twisted together

    flexible, reliable, and low cost

    connects devices with RJ-45 connector plug
    twisted pair cable
  50. for cable television transmission

    used for Internet connections via cable
    coaxial cable
  51. uses light to represent bits

    not susceptible to interference

    can carry signals for longer distances
    optical fiber
  52. use radio waves to carry bits
    Radio Frequency (RF) technologies
  53. high-frequency radio waves that can carry signals with high accuracy over long distances
  54. electrical power grid can be used for telecommunication
    electrical power lines
  55. telecommunications through power lines
    • Broadband over Power Lines (BPL)
    • or
    • Power Line Communication (PLC)
  56. combination of devices (or nodes) connected through a communication media
  57. computer network within a building, or a campus adjacent buildings

    established by a single organization and shared among employees
    local area network (LAN)
  58. a single computer controls the network
    server-based LAN
  59. no central device controls communications
    peer-to-peer LAN
  60. advantages of this are easier installation, more scalable, more flexible

    drawback is that they are less secure
    wireless LANs (WLANs)
  61. ease of expanding a system
  62. links multiple LANs within a large city

    typically uses fiber optic or wireless broadband connections between LANs
    Metropolitan area network (MAN)
  63. far-reaching system of networks composed of LANs or MANs

    may be public or private
    Wide area network (WAN)