Episode 74 — Backup Fundamentals: 3-2-1, Immutability, and Testing
Backups are the ultimate recovery safety net, but only if they’re designed correctly. This episode explains the 3-2-1 backup rule—three copies of data, on two media types, with one stored off-site—and why it remains the industry standard. You’ll learn how full, differential, and incremental backups differ, and how scheduling aligns with business Recovery Point Objectives (RPOs) and Recovery Time Objectives (RTOs). The conversation highlights how encryption, labeling, and retention policies protect both availability and confidentiality.
Listeners will also hear why immutability and testing are now essential. We discuss how ransomware-resistant storage prevents modification, how air-gapped backups isolate critical data, and how regular restoration drills confirm readiness. Real-world examples show that untested backups are just expensive archives, while tested ones form the backbone of business continuity. These principles map directly to GSEC exam domains on operational security and resilience, demonstrating how simple discipline ensures data survival when prevention fails. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.
