CNET 184 - CH3

  1. A designation for 802.3 Ethernet thin coaxial cable (also called thinnet, thinwire or cheapernet). This is a baseband transmission technology runnng at 10Mbps and can span up 185 meters (commonly rounded to 200).
  2. a designation for 802.3 ethernet thick coaxial cable (also called thicknet, or thickwire).this is a baseband transmision technology running at 10Mbps and can span up to 500 meters.
  3. A designation for 802.3 ethernet twisted-pair cable. This is a baseband transmission technology running at 10Mbps and can span roughly 100m.
  4. An IEEE standard for wireless neworking.
    802.11 Wireless Networking Standard
  5. the device that bridges wireless networking components and a wired network. it moves traffic between the wired and wireless sides as needed.
    Access Point Device
  6. Hardware devices that increase the power of electrical signals to maintain their original strength when transmitted accross a large network.
  7. the method of transmition used on broadband networks. creating analog wave forms from computer based digital data requires a special device called a digital-to-analog converter. reversing the process requires an analog-to-digital convertor. broad band networking equipment must have both to work.
  8. a 2.5 Mbps LAN technology created by DataPoint Corp. in the late 1970s. Uses token-based networking technology and runs over several kinds of coaxial cable, twisted pair, and fiber optic cable.
    attached resource computing network (ARCnet)
  9. The weaking of a signal as it travels the length of a medium, which eventually causes the signal to be unreliable.
  10. the part of the cableplant that interconnects telecomunications closets and equipment rooms. Cabling runs between floors or wings of a building and between buildings to carry network traffic detined for devices outside of the work area.
    Backbone Cabling
  11. a technology that uses digital signals sent over a cable without modulation. it send binary values as pulses of different voltages.
    Baseband transmission
  12. for network cabling, the maximum arc that a segment of cable can be bent of some unit of length (one foot or one meter) without incurring damage.
    Bend radius
  13. an analog transmission technique that can use multiple communication channels simultaneously. each data channel is represented by modulation on a particular frequency band, and sending or reciving equipment must be tuned to that band.
    Broadband transmission
  14. the combination of installed network cables, connectors, patch pannels, wall jacks, and other media components.
    cable plant
  15. a nontransparent layer of plastic or glass material inside fiberoptic cable; srrounds the inner core of glass or plastic fibers. provides rigidity, strength, and a manageable outer diameter for fiber-optic cables.
  16. a phenominon that occurs when two wires lay against each other in parallel. signals traveling down one wire can interfere with signals traveling down the other, and vice versa.
  17. a designation for cabling of any kind; indicates that cabling is suitable for transporting digital data. when applied to twisted-pair cabling, indicates that the cable is suitable for voice or data trafic.
  18. the form of spread spectrum data transmission that breaks data into fixed-length segments called chips and transmits the data on multiple frequencies.
    direct-sequence modulation
  19. a form of interference, also refered to as "noise", caused by emissions from external devices, such as transformers or electrical motors, that can disrupt network transmission over an electrical medium.
    electromagnetic interference (EMI)
  20. an area that serves as a connection point for back bone cabling running between telecommunications closets; also houses servers, routers, switches, and other major network equipment.
    equipment room
  21. a cabling technology that uses pulses of light sent along a ligh-conducting fiber at the heart of the cable to transfer information from sender rto reciever. can send data in only one direction, so two cables are required to permit network devices to exchange data in both directions.
  22. the type of sread-spectrum data transmission that swtiches data accross a range of frequencies over time. ___ transmitters and recivers must be syncronised to hop at that same time to the same frequencies.
    frequency hopping
  23. network cabling that runs from the work area's wall jack to the telecommunications closet and is usually terminated at a patch panel.
    horizontal wiring
  24. the ammount of time a signal take to travel from one end of a cable to the other.
  25. a fiber-optic connector that provides a high-density connection using two fiber-optic cables.
    mechanical transfer registered jack (MT-RJ)
  26. cable that has been burn tested to make sure it does emit toxic fumes or large amounts of smoke when incinerated. most building and fire codes require this designation for any cable to be run in ___ space.
  27. any interference caused by signals operationg in the radio frequency range. this term has become generic for interference caused by broadcast signals of any kind.
    radio frequency interference (RFI)
  28. a) The eight-wire modular jack used for TP networking cables and PBX-based telephone systems.

    b) the four-wire modular jack comonly used for home telephone handsets.
    a) registered jack 45 (RJ-45)

    b) RJ-11
  29. a variety of TP cabling in which a foil wrap encloses each of one or more pairs of wires for additional sheilding, and wire braid or an additional layer of foil might enclose the entire cable for further sheilding.
    shielded twisted-pair (STP)
  30. a form of Tp cabling that includes no additional shieling material in the cable composition. this cable encloses one or more pairs of twisted wires inside an outer jacket.
    unshielded twisted-pair (UTP)
  31. a designation for cable (usually TP) that indicates it's rated to carry only telhone traffic. not recommended for network use.
  32. a term used to indicate wireless networking, ususally using one of the 802.11 wireless networking standards.
    Wireless Fidelity (Wi-Fi)
  33. the space in a facility or office where computer workstations and other user devices are located.
    work area
  34. a wireless technology designed for wireless metropolitan area networks defined in standards 802.16-2004 and 802.16e.
    Worldwide Interoperability for Microwave Access (WiMax)
  35. a type of cabling in which two copper wires, each enclosed in some kind of sheath, are wrapped around eachother. the twisting permits narrow-guage wire, otherwise extrordinarily sensitve to crosstalk and interference, to carry higher-bandwidth signals over longer distances than is traditionally possible with straight wires. ___ cabling is used for voice telephone circuts as well as networking.
    twisted-pair (TP)
Card Set
CNET 184 - CH3
Key Terms