CAS-004 Security Architecture Practice Question
A company is migrating its workloads to a public cloud and wants to ensure it understands the division of security responsibilities. Which model defines the demarcation of security controls between the cloud provider and the customer?
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
✓
Shared responsibility model
The shared responsibility model clearly delineates which security tasks are handled by the cloud provider and which by the customer, varying by service type (IaaS, PaaS, SaaS).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Cloud Security Posture Management (CSPM)
Why it's wrong here
CSPM is a tool for monitoring cloud configurations, not a responsibility division model.
- ✗
Zero trust architecture
Why it's wrong here
Zero trust is a security framework, not a responsibility model.
- ✗
Cloud Access Security Broker (CASB)
Why it's wrong here
CASB is a security policy enforcement point between users and cloud services.
- ✓
Shared responsibility model
Why this is correct
This model defines security responsibilities between provider and customer.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
Go deeper
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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.