computing crossword

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Across
  1. 2. Address numbers used to identify a specific device
  2. 5. a set of rules governing the format of data sent over the Internet or other network.
  3. 7. rate/collisions The measurement of the effectiveness of a communications channel.
  4. 8. Name Server where domain names are translated into IP addresses
  5. 9. wires having a protective casing and used for transmitting electricity
  6. 11. Optic flexible fibres with a glass core through which light signals can be sent with very little loss of strength.
  7. 12. a range of frequencies within a given band, in particular that used for transmitting a signal.
Down
  1. 1. a facility allowing devices to connect to the Internet or communicate with one another wirelessly within a particular area.
  2. 3. The packets carry the data in the protocols that the Internet uses
  3. 4. a system for connecting a number of computer systems to form a local area network
  4. 6. rate the resending of packets which have been either damaged or lost
  5. 10. the delay before a transfer of data begins following an instruction for its transfer.