Ch. 10 Key Terms

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Author:
jamieljones
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122745
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Ch. 10 Key Terms
Updated:
2011-12-12 17:56:37
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Chapter Ten Planning Cabling Networks Network Fundamentals CCNA Exploration Companion Guide
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Chapter Ten Planning & Cabling Networks, Network Fundamentals, CCNA Exploration Companion Guide
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  1. console port
    Port on Cisco devices to which a terminal or computer with a terminal emulator is connected to the network device in order to communicate and configure the network device.
  2. CSU/DSU
    Channel Service Unit / Data Service Unit

    Device that connects a local digital phone loop for a WAN circuit to a serial interface on a network device (typically a router).

    Performs physical layer layer1 signaling on WAN circuits.
  3. DCE
    Data Communications Equipment

    Devices and connections of a communications network that comprise the network end of the user-to-network interface.

    • Physical connection to the network
    • Forwards traffic
    • Provides clocking signal used to synch data transmissions between DTE & DCE

    Ex: modems, Interface cards, etc...
  4. DTE
    Data Terminal Equipment

    Device at the user end of a user-network interface serving as a data source, destination or both.

    Ex: computers, protocol translators, multiplexers, etc...

    Connects data network through a DCE device (modem) and uses clocking signals generated by DCE.
  5. EMI
    Electromagnetic Interference

    Interference by magnetic signals caused by the flow of electricity.

    Causes reduced data integrity and increased error rates on transmission channels.

    { The electrical current creates magnetic fields, which in turn cause other electrical current in nearby wires. Induced electrical currents can interfere with proper operation of the other wire. }
  6. fiber-optics
    Glass fibers inside certain cables over which light is transmitted to encode 1s & 0s.
  7. MDI
    Media-Dependent Interface

    Normal mode of operation of Ethernet ports on hubs .

    Mapping of the wire pairs used in the hub port is a normal config.
  8. MDIX
    Media-Dependent Interface, Crossover

    Alternative operation of Ethernet ports on a hub.

    Mapping of the wire pairs used on the hub port is a crossover config. that allows for the use of a straight-through cable. (interconnects a hub to a hub)
  9. RFI
    Radio Frequency Interference

    Radio frequencies that create noise that interferes with information being transmitted across unshielded copper cabling (UTP).
  10. terminal emulator
    Application that runs a terminal for a remote host such as a router, switch, etc.
  11. Winchester connector
    34-pin female v.35 serial cable conector

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