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Implementation and System Security

Backup and recovery

  • 3 things to know
  • AS Unit 1

Overview

Four events a backup protects an organisation against, backup schedule and recovery point objective.

What you need to know

Answer each one before you reveal it.

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Key term

Name four events a backup protects an organisation against.

Key term

What is meant by recovery?

Key term

Why must a backup be stored away from the computers it protects?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is a backup?

    Model answer

    A backup is a copy of data taken so that the data can be restored if the original is lost, damaged or corrupted.

  2. 2

    Name four events a backup protects an organisation against.

    Model answer

    A backup protects against hardware failure, accidental deletion by a user, fire or theft destroying the equipment, and malicious damage such as a ransomware attack.

  3. 3

    What is meant by recovery?

    Model answer

    Recovery is the process of restoring data and services from backup copies after a loss, so that the organisation can carry on working.

  4. 4

    Why must a backup be stored away from the computers it protects?

    Model answer

    A fire, flood or theft that destroys the computers would destroy a backup kept beside them, so at least one copy is held off site or in a separate building.

  5. 5

    What is the 3-2-1 approach to backup?

    Model answer

    The 3-2-1 approach keeps three copies of the data, on two different types of media, with one of those copies held off site.

  6. 6

    Why must restoring from backup be tested regularly?

    Model answer

    A backup that has been silently failing or that cannot be read is worthless, and the only proof that it will work is to restore from it before it is actually needed.

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