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What is physical and wireless media?

Physical media: 

  • Twisted pair cable – consists of two independently insulated wires twisted around each other
         • Coaxial cable – consists of an insulated center wire grounded by a shield of braidedwire Fiber optic cable – contains hundreds of clear fiberglass or plastic fibers
         • ISDN line – a special digital telephone line that transmits and receives information at very high speeds

Wireless media:

  • Microwave system – transmits data via high-frequency radio signals through the atmosphere
         • Satellite system – receive signals from the earth, amplify them, and then transmit back these signals to the appropriate locations on the earth.
         • Cellular technology – uses antennae resembling telephone towers to pick up radio signals within a specific area

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