Unit 1 Revision

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Across
  1. 2. Rearranging scattered data on a disk to improve performance.
  2. 5. Camera connected to a computer for capturing live video.
  3. 7. Software that detects and removes computer viruses.
  4. 8. Device that produces physical copies of digital documents.
Down
  1. 1. Reducing the size of a file to save storage space.
  2. 3. Device that detects changes in the environment and sends data.
  3. 4. A duplicate copy of data stored for recovery if the original is lost.
  4. 6. Security system that monitors and blocks unwanted network access.