Quick Answer
The answer is an IPsec VPN. This is the most appropriate solution for protecting data in transit between an on-premises data center and a cloud VPC because IPsec operates at Layer 3 of the OSI model, providing network-layer encryption and authentication for all IP traffic traversing the tunnel. Unlike application-specific solutions, IPsec secures the entire site-to-site connection without requiring per-application configuration, ensuring confidentiality, integrity, and replay protection across the public internet or a direct connect link. On the Certified Cloud Security Professional CCSP exam, this scenario tests your understanding of network security controls for hybrid cloud architectures; a common trap is choosing SSL/TLS, which is designed for client-to-server web traffic rather than persistent site-to-site tunnels. Remember the memory tip: “IPsec for site-to-site, TLS for client-to-site.”
This CCSP practice question tests your understanding of cloud data security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 cloud architect needs to protect data in transit between an on-premises data center and a cloud virtual private cloud (VPC). Which solution is MOST appropriate?
SSL certificate on web server
Why wrong: SSL protects only web traffic, not all data in transit.
TLS for each application
Why wrong: TLS is application-layer, not a network-wide solution.
VPN with IPsec
IPsec VPN encrypts all traffic between sites.
Direct Connect without encryption
Why wrong: Direct Connect is a private connection but may not encrypt data by default.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
VPN with IPsec
An IPsec VPN is the most appropriate solution for protecting data in transit between an on-premises data center and a cloud VPC because it provides network-layer encryption and authentication for all IP traffic between the two sites. IPsec operates at Layer 3, securing the entire tunnel without requiring per-application configuration, and is designed specifically for site-to-site connectivity. This ensures confidentiality, integrity, and replay protection for all data traversing the public internet or a direct connect link.
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.
SSL certificate on web server
Why it's wrong here
SSL protects only web traffic, not all data in transit.
TLS for each application
Why it's wrong here
TLS is application-layer, not a network-wide solution.
VPN with IPsec
Direct Connect without encryption
Why it's wrong here
Direct Connect is a private connection but may not encrypt data by default.
Common exam traps
ISC2 often tests the misconception that TLS or SSL is sufficient for all data-in-transit scenarios, but the trap here is that TLS is application-layer and cannot secure non-HTTP traffic or provide a site-to-site tunnel, whereas IPsec is the correct network-layer solution for connecting entire networks.
Detailed technical explanation
IPsec operates in two modes: transport mode (protecting payload only) and tunnel mode (encapsulating the entire IP packet), with tunnel mode being standard for site-to-site VPNs. It uses protocols like IKEv2 for key exchange and ESP for encryption (e.g., AES-256) and authentication (e.g., SHA-256). In a real-world scenario, an IPsec VPN can be terminated on a cloud provider's VPN gateway (e.g., AWS VPN or Azure VPN Gateway) and an on-premises firewall, ensuring all traffic between the VPC and data center is encrypted regardless of application or port.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
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FAQ
Cloud Data Security — This question tests Cloud Data Security — Read the scenario before looking for a memorised answer..
The correct answer is: VPN with IPsec — An IPsec VPN is the most appropriate solution for protecting data in transit between an on-premises data center and a cloud VPC because it provides network-layer encryption and authentication for all IP traffic between the two sites. IPsec operates at Layer 3, securing the entire tunnel without requiring per-application configuration, and is designed specifically for site-to-site connectivity. This ensures confidentiality, integrity, and replay protection for all data traversing the public internet or a direct connect link.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.
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