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What is the 3-2-1 backup rule?

  1. A Three copies, on two media types, with one off-site
  2. B Three backups daily
  3. C Three servers in two sites
  4. D Three full and two incremental backups
Answer

Three copies, on two media types, with one off-site

Modern practice adds an immutable or air-gapped copy, because ransomware specifically targets reachable backups.

All IT MCQs

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