Industrial networks

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Across
  1. 3. Sequence of information bits.
  2. 5. Way to protect code from errors.
  3. 7. Name of the modul of the PLC for create network.
Down
  1. 1. Physical connector.
  2. 2. Type of OSI layer.
  3. 4. What is the name of the "space" for data transmission.
  4. 6. Type of topology.