K1.21 The purpose, criteria and types of back-up involved in risk mitigation:
• purpose:
o maintaining an up-to-date copy of data to enable future recovery and restoration (for example full
disaster recovery or partial data loss)
• back-up criteria:
o frequency (for example periodic back-ups)
o source (for example files or data)
o destination (for example internal, external)
o storage (for example linear tape open (LTO), cloud, disk)
• types of back-up:
o full
o incremental
o differential
o mirror
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