Glass Fiber

              =>     Also known as optical fiber - a thin glass

                                           tube that reflects light internally and is

                                           orated in plastic for flexibility

                                   =>   Transmitter uses LED or laser and receiver

                                           uses a light sensitive transistor

      Advantages                                                   Disadvantages  

    ð no electrical interference                          ð installation requires more              

    ð carry a signal much further than copper         specialized equipment

    ð carry more information at a time               ð breaks in the fiber are

    ð only needs one fiber - unlike copper that       hard to detect and repairs

       requires a pair to form a circuit                        are difficult