This CCSP practice question tests your understanding of cloud data security. 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 cloud customer wants to ensure that their data is encrypted during transmission between their on-premises data center and the cloud provider's service. Which protocol should they use?
Internet Protocol Security (IPSec)
Why wrong: IPSec can be used but is more complex; TLS is more common for cloud APIs.
Transport Layer Security (TLS) 1.2
TLS is the standard for encrypting data in transit over networks.
Secure Shell (SSH)
Why wrong: SSH is for secure remote login, not typically for bulk data transfer.
Remote Desktop Protocol (RDP)
Why wrong: RDP is for remote desktop, not general data transfer.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Transport Layer Security (TLS) 1.2
TLS 1.2 is the correct choice because it is specifically designed to secure data in transit over networks, such as between an on-premises data center and a cloud provider. It operates at the transport layer, providing encryption, authentication, and integrity for HTTP-based traffic (HTTPS), which is the most common method for cloud API interactions. IPSec, while also a valid encryption protocol, is typically used for site-to-site VPN tunnels at the network layer, not for securing individual service-to-service transmissions like those to a cloud provider's REST API.
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.
Internet Protocol Security (IPSec)
Transport Layer Security (TLS) 1.2
Why this is correct
TLS is the standard for encrypting data in transit over networks.
Related concept
Read the scenario before looking for a memorised answer.
Secure Shell (SSH)
Why it's wrong here
SSH is for secure remote login, not typically for bulk data transfer.
Remote Desktop Protocol (RDP)
Why it's wrong here
RDP is for remote desktop, not general data transfer.
Common exam traps
ISC2 often tests the distinction between network-layer encryption (IPSec) and transport-layer encryption (TLS), leading candidates to choose IPSec because it is commonly associated with 'secure transmission' between sites, but the question specifies 'between their on-premises data center and the cloud provider's service,' which implies application-level communication, not a full network tunnel.
Detailed technical explanation
TLS 1.2 uses a combination of symmetric encryption (e.g., AES-256) for bulk data and asymmetric encryption (e.g., RSA or ECDHE) for key exchange, ensuring forward secrecy when ephemeral Diffie-Hellman is used. In a real-world scenario, a cloud customer would configure their application to use HTTPS (HTTP over TLS) when calling cloud provider APIs like AWS S3 or Azure Blob Storage, which automatically encrypts all data in transit. A subtle behavior is that TLS 1.2 requires proper certificate validation to prevent man-in-the-middle attacks, and misconfigured cipher suites can downgrade security.
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: Transport Layer Security (TLS) 1.2 — TLS 1.2 is the correct choice because it is specifically designed to secure data in transit over networks, such as between an on-premises data center and a cloud provider. It operates at the transport layer, providing encryption, authentication, and integrity for HTTP-based traffic (HTTPS), which is the most common method for cloud API interactions. IPSec, while also a valid encryption protocol, is typically used for site-to-site VPN tunnels at the network layer, not for securing individual service-to-service transmissions like those to a cloud provider's REST API.
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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