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Security Professional

Assume you are a security professional. You are determining which of the following backup strategies will provide the best protection against data loss, whether from disk failure or natural disaster:

Daily full server backups with hourly incremental backups
Redundant array of independent disks (RAID) with periodic full backups
Replicated databases and folders on high-availability alternate servers
Answer the following question(s):

Which backup strategy would you adopt? Why?