The answer is to develop a vendor risk management policy that includes security assessments, contractual clauses, and periodic audits. This is the most comprehensive course of action because it directly addresses the root cause: the absence of any formal oversight or contractual security requirements for the third-party vendor. A vendor risk management program establishes a continuous lifecycle of due diligence, contractual enforcement, and ongoing monitoring, which prevents the kind of unassessed privileged access that led to the ransomware. On the CompTIA SecurityX CAS-004 exam, this question tests your understanding that a single technical control like MFA or network segmentation is insufficient to manage third-party risk; the exam emphasizes governance and policy as the foundation for a vendor risk management program after ransomware. A common trap is choosing a point solution (e.g., MFA) over a holistic program. Memory tip: think "Policy, Contract, Audit" as the three legs of a stable vendor risk stool.
CAS-004 Governance, Risk and Compliance Practice Question
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.
You are the security architect for a global manufacturing company that has recently experienced a ransomware attack. The attack originated from a third-party vendor's compromised VPN account, which had been granted privileged access to the corporate network for remote maintenance. The vendor is a critical supplier of industrial control system (ICS) components. The incident severely disrupted production for three days. Post-incident analysis reveals that the vendor's security posture was not assessed prior to granting access, and the contract did not include specific security requirements or audit rights. The company now wants to implement a vendor risk management program to prevent future incidents. Which of the following is the MOST comprehensive and effective course of action to address the root cause?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Develop a vendor risk management policy that includes security assessments, contractual clauses, and periodic audits
Option C is correct because establishing a formal vendor risk management program with contractual security requirements and periodic audits directly addresses the lack of assessment and oversight. Option A is wrong because network segmentation alone does not enforce vendor compliance. Option B is wrong because MFA is a single control; it does not replace a program. Option D is wrong because instituting background checks does not ensure technical security controls.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Implement network segmentation to isolate vendor access to specific systems
Why it's wrong here
Segmentation reduces blast radius but does not enforce vendor risk management.
✗
Conduct background checks on all vendor personnel before granting access
Why it's wrong here
Background checks do not address technical security controls.
✓
Develop a vendor risk management policy that includes security assessments, contractual clauses, and periodic audits
Why this is correct
A comprehensive program addresses root cause of lack of oversight.
Related concept
Authentication checks who the user is.
✗
Require all vendors to use multi-factor authentication (MFA) for remote access
Why it's wrong here
MFA is good but does not address contractual or audit requirements.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CAS-004 questions on access control and AAA configuration.
Governance, Risk and Compliance — This question tests Governance, Risk and Compliance — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Develop a vendor risk management policy that includes security assessments, contractual clauses, and periodic audits — Option C is correct because establishing a formal vendor risk management program with contractual security requirements and periodic audits directly addresses the lack of assessment and oversight. Option A is wrong because network segmentation alone does not enforce vendor compliance. Option B is wrong because MFA is a single control; it does not replace a program. Option D is wrong because instituting background checks does not ensure technical security controls.
What should I do if I get this CAS-004 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CAS-004 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Question Discussion
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