The correct choice is to establish multiple redundant IPsec VPN tunnels to the VPC, as this design directly meets the requirements for a hybrid cloud encrypted resilient connection. IPsec with IKEv2 provides strong encryption and mutual authentication for all data in transit, while redundant tunnels ensure automatic failover if one tunnel drops, maintaining continuous connectivity between AWS and the on-premises data center. On the CompTIA SecurityX CAS-004 exam, this scenario tests your understanding of secure hybrid network architectures, often contrasting IPsec VPNs with Direct Connect (which is private but not inherently encrypted) or SSL tunnels (typically limited to web traffic). A common trap is assuming Direct Connect alone provides encryption, but it requires an additional IPsec layer for confidentiality. Memory tip: think “IPsec + IKEv2 = encrypted and authenticated; redundancy = resilient,” and remember that MPLS is a carrier service, not a security protocol.
CAS-004 Security Architecture Practice Question
This CAS-004 practice question tests your understanding of security architecture. 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 designing a hybrid cloud architecture with AWS and an on-premises data center. They need to ensure that all data transmitted between environments is encrypted and that the connection is resilient. Which design should the architect choose?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Establish multiple redundant IPsec VPN tunnels to the VPC
A VPN tunnel using IPsec with IKEv2 provides encryption and authentication; redundant tunnels ensure failover. Direct Connect is private but often requires separate encryption. SSL tunnel would work but typically for web traffic. MPLS is a carrier service, not inherently encrypted.
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.
✗
Deploy a single MPLS connection with network-based encryption
Why it's wrong here
Single connection lacks redundancy, and MPLS encryption is not standard.
✗
Set up a single AWS Direct Connect connection and rely on the provider's encryption
Why it's wrong here
Direct Connect does not automatically encrypt data; additional encryption is needed and single connection lacks resilience.
✓
Establish multiple redundant IPsec VPN tunnels to the VPC
Why this is correct
Redundant IPsec tunnels provide both encryption and resilience.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use an SSL VPN tunnel from the on-premises firewall to the VPC
Why it's wrong here
SSLVPN is often client-based and may not support site-to-site; also typically single tunnel.
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 practitioner preparing for the CAS-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which CAS-004 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.
Security Architecture — This question tests Security Architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Establish multiple redundant IPsec VPN tunnels to the VPC — A VPN tunnel using IPsec with IKEv2 provides encryption and authentication; redundant tunnels ensure failover. Direct Connect is private but often requires separate encryption. SSL tunnel would work but typically for web traffic. MPLS is a carrier service, not inherently encrypted.
What should I do if I get this CAS-004 question wrong?
Identify which CAS-004 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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Question Discussion
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