Modern Communication

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Across
  1. 1. a signal to or from a computer encoded as 1(on) or 0(off)
  2. 4. a sound or action used to give information
  3. 5. an electric signal whose value changes between two values
  4. 6. an unavoidable modification of an analog signal that changes the original information
Down
  1. 2. a representation of the information that is communicated
  2. 3. an unavoidable modification of a digital signal