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What is network? - Coggle Diagram

- - - - Each strand,called an optical fiber,is as thin as a human hair
      - Inside the fiber-optic cable,an insulating glass caldding and a protective coating surround each optical fiber.
      - The core of fiber-optic cable consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals
    - - Consists of a single copper wire surrounded by at least three layers : (1) insulating material , (2) a woven or braided metal, and (3) a plastic outer coating.
      - Cable television (CATV)network wiring often uses coaxial cable because it can be cabled over longer distances than twisted-pair cable.
    - - The wires are twisted together to reduce noise.Noise is an electrical disturbance that can degrade communications.
      - One of the more widely used transmission media for network cabling and telephone systems