Quick Answer
The primary benefit of using a FedRAMP Authorized CSP is that its existing authorization can be reused, which significantly reduces the agency’s assessment burden. This is because the CSP has already passed a rigorous third-party assessment and continuous monitoring process, allowing the agency to leverage that proven security posture rather than starting from scratch. On the CompTIA SecurityX CAS-004 exam, this concept tests your understanding of the FedRAMP reuse model, often appearing in scenario-based questions where a security architect must choose a CSP to streamline an Authority to Operate (ATO) process. A common trap is assuming FedRAMP authorization eliminates all agency risk management responsibilities—it does not; the agency still owns the residual risk and must ensure its own system controls align with the Moderate baseline. Memory tip: think “reuse, not redo”—the CSP’s stamp of approval saves you the heavy lift of a full assessment, but you still sign the final ATO.
This CAS-004 practice question tests your understanding of governance, risk and compliance. 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.
A security architect is designing a system that must comply with FedRAMP Moderate controls. The system will use a cloud service provider (CSP) that is already FedRAMP Authorized. What is the primary benefit of using this CSP?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
The agency no longer needs to conduct any risk assessments
Why wrong: Agency retains responsibility
The CSP guarantees 100% security
Why wrong: No guarantee
The system automatically complies with all international regulations
Why wrong: Only FedRAMP
The CSP's authorization can be reused, reducing the agency's assessment burden
Leverages existing authorization
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The CSP's authorization can be reused, reducing the agency's assessment burden
The primary benefit of using a FedRAMP Authorized CSP is that the CSP has already undergone a rigorous third-party assessment and continuous monitoring process. This allows the agency to reuse the existing authorization (via the 'JAB' or agency Provisional Authorization), significantly reducing the time, cost, and effort required for the agency's own assessment and authorization (ATO) process. It does not eliminate the agency's responsibility for risk management or compliance with FedRAMP Moderate controls, but it leverages the CSP's proven security posture.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The agency no longer needs to conduct any risk assessments
Why it's wrong here
Agency retains responsibility
The CSP guarantees 100% security
Why it's wrong here
No guarantee
The system automatically complies with all international regulations
Why it's wrong here
Only FedRAMP
The CSP's authorization can be reused, reducing the agency's assessment burden
Why this is correct
Leverages existing authorization
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Cisco often tests the misconception that FedRAMP authorization absolves the agency of all compliance work, when in fact the agency must still perform a system-specific risk assessment and maintain its own ATO for the overall system.
Detailed technical explanation
FedRAMP operates on a 'do once, use many times' model, where a CSP's authorization package (including the System Security Plan, Security Assessment Report, and Plan of Action and Milestones) is stored in the FedRAMP repository. Agencies can inherit the CSP's control implementations (e.g., AC-2, AU-3, SC-7) by referencing the CSP's customer responsibility matrix (CRM) and mapping those controls to their own system boundary. This reuse is formalized through a 'leveraged authorization' process, where the agency's Authorizing Official accepts the CSP's authorization as part of the agency's risk acceptance, but the agency must still document its own system-specific controls and residual risks.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Governance, Risk and Compliance — This question tests Governance, Risk and Compliance — Read the scenario before looking for a memorised answer..
The correct answer is: The CSP's authorization can be reused, reducing the agency's assessment burden — The primary benefit of using a FedRAMP Authorized CSP is that the CSP has already undergone a rigorous third-party assessment and continuous monitoring process. This allows the agency to reuse the existing authorization (via the 'JAB' or agency Provisional Authorization), significantly reducing the time, cost, and effort required for the agency's own assessment and authorization (ATO) process. It does not eliminate the agency's responsibility for risk management or compliance with FedRAMP Moderate controls, but it leverages the CSP's proven security posture.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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