Is a Backup Needed? — TechKnowSurge

About this interactive

With RAID and replication, and data that is very durable in the cloud, it can seem a backup is no longer needed. RAID guards against a disk failing, and replication against a server, an array or a site going down. Both keep live copies, so if something goes down you are back up and running at once. But live copies take every change, including the bad ones. If data gets corrupted on one copy, there is a high probability it gets corrupted on the other. Corruption happens on databases and on files, and so do viruses. Without an earlier version, a backup, there is nothing to go back to.

What you'll learn

Decide whether RAID and replication already protect data against a given loss (a failed disk, server or site) or whether only a backup will (corruption, deletion, ransomware and other changes that spread to every live copy)

Aligned to

CompTIA Security+

3.4 Explain the importance of resilience and recovery in security architecture.

Key terms

Backup: A copy of data captured at a specific point in time and stored separately from the source system, used to restore information in the event of data loss, corruption, or a security incident such as ransomware.
Replication: The process of copying and continuously synchronizing data from one location to another to ensure availability and fault tolerance in the event of a failure.
Redundant Array of Independent Disks: A data storage technology that combines multiple physical drives into a logical unit to improve performance, provide redundancy, or both, depending on the RAID level chosen. Common levels include RAID 0 (striping for speed), RAID 1 (mirroring for redundancy), and RAID 5 (striping with parity).
Ransomware: A type of malware that encrypts a victim's files and demands payment in exchange for the decryption key.

Topics

Interactive Streak Sort

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