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1.5 TRANSMISSION MEDIUM
              In data communication, a transmission medium is defined as a pathway between a sender and receiver. In other
              words,  it  is  a  way  through  which  information  is  transmitted  from  one  computer  to  another  computer.  Another
              name for transmission medium is communication channel. The data is transmitted in the form of signals through
              communication channels. Signals change the data into suitable format for transmission medium. There are mainly two
              types of transmission media which are as follows:
              Ð ÐGuided Media
              Ð ÐUnguided Media
              Let us discuss about them in detail.

              Guided Media

              Guided media refers to the physical medium through which the signals are transmitted. It is also known as bounded or
              wired media. Features of guided media are as follows:

              Ð ÐIts speed is very high.
              Ð ÐIt is secure.

              Ð ÐIt is used for reasonably shorter distances.
              There are mainly three types of guided media which are as follows:

              Twisted Pair Cable
              Twisted pair cables have two insulation-covered conductors, each of which is typically constructed of copper. Twisted
              pair cables derive their name from the way these two conductors are twisted together. Due to their small size, these
              cables are affordable and simple to install. They are typically used to transmit voice and data over short distances.
              Compared to other types of cables, it is less expensive. However, these cables have less bandwidth.
                                                                                   Copper Conductor
                                        Twisted Pair








                                                                                Insulating material

              Coaxial Cable
              An electrical cable containing a copper conductor, an insulator covering it, and a braided metal mesh that reduces
              crosstalk and signal interference is known as a coaxial cable. A braided metal conductor surrounds the insulator, which
              helps to reduce cross talk and electrical signal interference. The core copper conductor is used to transmit signals, the
              insulator to provide insulation to the copper conductor. To further safeguard the cable, the entire set-up is once more
              wrapped with a layer of protective plastic. Coaxial cable installation is simple. These cables are more dependable and
              long-lasting because of their improved cut-through resistance.
                                        Protective
                                        Plastic Layer     Braided
                                                       Metal Conductor  Insulator      Copper
                                                                                      Conductor









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