Data transmission crossword

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Across
  1. 3. A key known only to one user/computer
  2. 5. Encryption that uses public and private keys to secure data
  3. 8. A computer capable of very fast calculations using probability, allowing it to process much more data than traditional computers
  4. 10. A type of serial data transmission which has become the industry standard for connecting computers to devices via a USB port
  5. 15. Sending data down one channel/wire one bit at a time
  6. 17. A method of transmission in which a message is broken into many data packets which can then be sent along pathways independently of each other
  7. 18. The part of a data packet that indicates the end of the data packet and cyclic redundancy check error check
  8. 21. A verification method used to check if data transferred has been altered or corrupted; calculated from the data block and sent after each block
  9. 22. Data that arrives at the destination with the bits no longer synchronised
  10. 23. Stages in a network that can receive and transmit data packets; routers are nodes in communication networks
  11. 25. A bit (either 0 or 1) added to a byte of data in the most significant bit position; ensures correct parity protocol
  12. 27. The actual data being carried in a data packet
  13. 28. The process of making data meaningless using encryption keys
  14. 29. Data that can be sent in both directions at the same time (simultaneously)
  15. 31. Encrypted data produced from plaintext using an encryption algorithm
  16. 33. A horizontal and vertical parity check on a block of data being transmitted
  17. 34. A method used to check if data has been transferred correctly; it makes use of even parity or odd parity
  18. 35. The original text/message before encryption
Down
  1. 1. A key used in symmetric encryption that both parties have access to
  2. 2. Encryption where the same key is used to encrypt and decrypt a message
  3. 4. A message sent to the sender indicating that data has been received correctly
  4. 6. Another name for a hacker who intercepts data being transmitted on a network
  5. 7. A key known to all users
  6. 9. An extra byte of data sent at the end of a parity block; composed of parity bits from a vertical parity check
  7. 11. The time interval allowed to elapse before an acknowledgement is received
  8. 12. Data that can be sent in one direction only
  9. 13. A small part of a message/data that is transmitted over a network; after transmission all the data packets are reassembled to form the original message/data
  10. 14. A device that enables data packets to be moved between different networks, for example to join a LAN to a WAN
  11. 16. A method where data is sent to a receiver and immediately sent back to verify accuracy
  12. 19. An additional digit appended to a number to check if the entered number is error-free
  13. 20. A method of checking transmitted data for errors using acknowledgement and timeout to request re-sending
  14. 24. Data that can be sent in both directions but not at the same time
  15. 26. The part of the data packet that contains the IP addresses of the sender and receiver, and includes the packet number which allows reassembly of the data packets
  16. 30. Software that converts plaintext into ciphertext
  17. 32. Sending data down several channels/wires several bits at a time (usually 1 byte)