- A
Two copies on three different media types with one onsite
Why wrong: Incorrect order.
- B
One copy on two different media types with three offsite
Why wrong: Incorrect.
- C
Three copies on two different media types with one offsite
Correct description of the rule.
- D
Three copies on three different media types with two offsite
Why wrong: Incorrect.
Question 573 of 1,000
SSCP Security Operations and Administration Practice Question
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 of the following is a key principle 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
✓
Three copies on two different media types with one offsite
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.
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.
- ✗
Two copies on three different media types with one onsite
Why it's wrong here
Incorrect order.
- ✗
One copy on two different media types with three offsite
Why it's wrong here
Incorrect.
- ✓
Three copies on two different media types with one offsite
Why this is correct
Correct description of the rule.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Three copies on three different media types with two offsite
Why it's wrong here
Incorrect.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often misremember the numbers, confusing the '3' copies with '3' media types or '2' offsite, leading them to select options like A or D that sound plausible but violate the exact 3-2-1 structure.
Detailed technical explanation
How to think about this question
Under the hood, the 3-2-1 rule ensures resilience against multiple failure scenarios: the two different media types protect against media-specific failures (e.g., a disk head crash vs. tape degradation), while the offsite copy guards against site-wide events like fire, flood, or ransomware that could destroy all local copies. In practice, this often translates to using local disk (e.g., RAID-protected NAS) for fast recovery, tape or cloud storage (e.g., AWS S3 Glacier) for the second medium, and a geographically separate data center or cloud region for the offsite copy. The rule does not mandate a specific number of media types beyond two, nor does it require multiple offsite copies, as the primary goal is cost-effective redundancy without overcomplication.
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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Security Operations and Administration — study guide chapter
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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: Three copies on two different media types with one offsite — 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.
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.
About these practice questions
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Last reviewed: Jul 4, 2026
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.
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