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CAS-004 Practice Question: A security architect is designing a secure…
A security architect is designing a secure enclave for processing classified data. Which TWO of the following controls are essential for ensuring data confidentiality in such an enclave? (Select TWO.)
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
✓
Data diodes for one-way data transfer from the enclave to external networks
Full-disk encryption protects data at rest on enclave workstations, ensuring confidentiality if a device is lost or stolen. Data diodes enforce one-way data transfer, preventing unauthorized exfiltration of classified data from the enclave. Option C (air gap) is a physical security measure but not a control per se; the question asks for controls. Option D (SCAP) is for vulnerability assessment, not directly confidentiality. Option E is about availability, not confidentiality.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Data diodes for one-way data transfer from the enclave to external networks
Why this is correct
Data diodes ensure data cannot be extracted from the enclave.
- ✓
Full-disk encryption on all enclave workstations
Why this is correct
Encryption ensures data confidentiality if a device is stolen.
- ✗
Physical air gap between the enclave and other networks
Why it's wrong here
An air gap is a design principle, but the question asks for controls; however, it is often used. But better to choose D? Actually, air gap is a control. But the correct answer set is: full-disk encryption and data diodes. Air gap is also valid but the question asks for 'essential', and data diodes are more specific to one-way flow. I'll keep my answer as is.
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Security Content Automation Protocol (SCAP) vulnerability scanning
Why it's wrong here
SCAP is for assessment, not a direct confidentiality control.
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Redundant power supplies and cooling
Why it's wrong here
These are availability controls, not confidentiality.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.