The Functions Performed Within Communication Systems

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Across
  1. 1. sent by the sender to receiver
  2. 3. data
  3. 4. origin
  4. 6. interface, transmitter
  5. 8. common clock
  6. 10. server, user's identity
  7. 11. security
Down
  1. 2. decodes
  2. 5. protocol levels
  3. 7. bringing something to existence
  4. 9. mediums