CAS-004 Security Architecture Practice Question
In the shared responsibility model for cloud security, which of the following is typically the responsibility of the customer when using an Infrastructure as a Service (IaaS) model?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Encryption of data at rest within the environment
In IaaS, the customer is responsible for securing the operating system, applications, and data. The cloud provider is responsible for the physical infrastructure, hypervisor, and network. Encryption of data at rest is typically a customer responsibility, as they control the data. Physical security is the provider's responsibility. Network infrastructure is the provider's responsibility.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configuration of the hypervisor
Why it's wrong here
The hypervisor is managed by the cloud provider; customers do not configure it.
- ✗
Network infrastructure maintenance
Why it's wrong here
The cloud provider maintains the underlying network infrastructure.
- ✗
Physical security of data centers
Why it's wrong here
Physical security is the responsibility of the cloud provider.
- ✓
Encryption of data at rest within the environment
Why this is correct
Customers are responsible for encrypting their own data, including data at rest, as they control the encryption keys and policies.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.