This SCS-C02 practice question tests your understanding of data protection. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 company is migrating its on-premises file server to Amazon EFS. The data includes sensitive financial records. The security team requires encryption at rest and in transit. The team plans to mount the EFS file system on EC2 instances using the NFS client. They have enabled encryption at rest on the EFS file system. However, they are unsure how to enforce encryption in transit. What should they do to ensure all data transferred between the EC2 instance and EFS is encrypted?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Mount the EFS file system using the `mount -t nfs4 -o tls` command on the EC2 instance.
Option B is correct. To enforce encryption in transit for EFS, you must use the `mount` command with the `tls` option. This ensures the NFS client uses TLS encryption. Option A is wrong because enabling encryption in transit in the EFS console only allows it, but the client must also request it. Option C is wrong because VPC Peering does not encrypt traffic. Option D is wrong because AWS Certificate Manager is not used for EFS encryption in transit.
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.
✓
Mount the EFS file system using the `mount -t nfs4 -o tls` command on the EC2 instance.
Why this is correct
The tls option forces the NFS client to use TLS for encryption in transit.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable encryption in transit in the EFS file system policy and rely on the default NFS client behavior.
Why it's wrong here
The EFS file system policy can allow encryption in transit, but the client must request it using the tls option.
✗
Set up a VPN connection between the VPC and the on-premises network to encrypt all traffic.
Why it's wrong here
The traffic between EC2 and EFS stays within the VPC; a VPN is not needed.
✗
Use AWS Certificate Manager to issue a certificate for the EFS file system.
Why it's wrong here
ACM is for SSL/TLS certificates for web servers, not for EFS.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which SCS-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Data Protection — This question tests Data Protection — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Mount the EFS file system using the `mount -t nfs4 -o tls` command on the EC2 instance. — Option B is correct. To enforce encryption in transit for EFS, you must use the `mount` command with the `tls` option. This ensures the NFS client uses TLS encryption. Option A is wrong because enabling encryption in transit in the EFS console only allows it, but the client must also request it. Option C is wrong because VPC Peering does not encrypt traffic. Option D is wrong because AWS Certificate Manager is not used for EFS encryption in transit.
What should I do if I get this SCS-C02 question wrong?
Identify which SCS-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This SCS-C02 practice question is part of Courseiva's free Amazon Web Services 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 SCS-C02 exam.
Question Discussion
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