Question 787 of 1,000
Security Operations and AdministrationmediumMultiple SelectObjective-mapped

3-2-1 Backup Rule: Key Components

This SSCP practice question tests your understanding of security operations and administration. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Which TWO of the following are key components of the 3-2-1 backup rule?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

At least three copies of the data

The 3-2-1 backup rule mandates at least three copies of the data (one primary and two backups) to ensure redundancy against failures. Option D directly states this requirement, which is the '3' in the rule.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • One copy stored in a different geographic location

    Why it's wrong here

    The rule requires one copy offsite, which is a different location, but the phrase 'different geographic location' is ambiguous; the correct term is offsite.

  • Daily full backups

    Why it's wrong here

    The rule does not specify backup frequency.

  • All backups must be encrypted

    Why it's wrong here

    Encryption is recommended but not part of the 3-2-1 rule.

  • At least three copies of the data

    Why this is correct

    Three copies include the original and two backups.

    Related concept

    Read the scenario before looking for a memorised answer.

  • At least two different media types

    Why this is correct

    Using different media types (e.g., disk and tape) protects against a single point of failure.

    Related concept

    Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

ISC2 SSCP often tests the exact wording of the 3-2-1 rule, and candidates mistakenly think 'different geographic location' is a separate numbered component, but it is actually the '1' (one offsite copy) and not a distinct key component like the number of copies or media types.

Trap categories for this question

  • Keyword trap

    The rule requires one copy offsite, which is a different location, but the phrase 'different geographic location' is ambiguous; the correct term is offsite.

Detailed technical explanation

How to think about this question

The 3-2-1 rule is a foundational data protection strategy: three copies of data, stored on two different media types (e.g., disk and tape, or local NAS and cloud object storage), with one copy offsite to protect against site-level disasters. In practice, the 'two different media types' helps mitigate against media-specific failures, such as a firmware bug affecting all disks of a certain model, while the offsite copy ensures recovery from events like fire or flood. This rule is often implemented using backup software that supports multi-destination jobs and media rotation schemes.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this SSCP question test?

Security Operations and Administration — This question tests Security Operations and Administration — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: At least three copies of the data — The 3-2-1 backup rule mandates at least three copies of the data (one primary and two backups) to ensure redundancy against failures. Option D directly states this requirement, which is the '3' in the rule.

What should I do if I get this SSCP question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Same concept, more angles

2 more ways this is tested on SSCP

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. An organization's backup policy states: 'Maintain three copies of data on two different media types, with one copy stored offsite.' This is known as:

medium
  • A.Incremental backup strategy
  • B.Grandfather-father-son rotation
  • C.3-2-1 rule
  • D.Disaster recovery plan

Why C: The 3-2-1 rule is a foundational data backup strategy that mandates maintaining three total copies of data, stored on two different types of media (e.g., disk and tape), with one copy located offsite to protect against site-level disasters. This directly matches the policy described, making option C correct.

Variation 2. Which of the following is a key principle of the 3-2-1 backup rule?

easy
  • A.Two copies on three different media types with one onsite
  • B.One copy on two different media types with three offsite
  • C.Three copies on two different media types with one offsite
  • D.Three copies on three different media types with two offsite

Why C: The 3-2-1 backup rule is a foundational data protection strategy: maintain three copies of your data (one primary and two backups), store them on two different media types (e.g., disk and tape, or local SSD and cloud object storage), and ensure at least one copy is stored offsite to protect against site-level disasters. Option C correctly captures this: three copies, two media types, one offsite.

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Last reviewed: Jul 4, 2026

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This SSCP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SSCP exam.