The Internet and Education

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Across
  1. 3. a pool of computer connected to each other
  2. 4. This network of networks
  3. 5. Traditional transmission signal
  4. 6. network that covers a limited area
  5. 7. Secretiv country
Down
  1. 1. A form of communication at a distance
  2. 2. A device that modulates and demodulates