• 2022-06-06
    The electrical transmission medium can consist of .
    A: a pair of wires
    B: a coaxial cable
    C: a radio link through free space down
    D: all of above
  • D

    内容

    • 0

      ______________ are a type of cable that is used by cable TV. A: Fiber cables B: Twisted pair cables C: Coaxial cables

    • 1

      In a data communication system, the transport media with the widest frequency band and best reliability is the( ). A: radio channel B: coaxial cable C: twisted--pair cable D: fiber optic cable

    • 2

      X-rays _____. A: always travel in a straight line B: can be influenced by an electrical field C: are absorbed equally by the materials they pass through D: None of the above

    • 3

      Coaxial Cable:____________

    • 4

      The medium through which communication travels is called a ________. ( ) A: message B: channel C: media D: transmission E: vessel