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CCSP Practice Question: A financial services company is migrating its…
A financial services company is migrating its on-premises data center to a public cloud IaaS environment. During the transition, the security team must ensure that the same network segmentation and firewall rules are maintained. Which of the following is the BEST approach to replicate the on-premises network security controls in the cloud?
⚠ Common exam trap
A common mix-up: candidates confuse extending the network via VPN (Option A) with replicating segmentation, not realizing that VPNs merge networks rather than isolating them, while virtual private clouds (VPCs) provide the necessary logical isolation and granular firewall controls.
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
✓
Use virtual private clouds (VPCs) with subnets and security groups to enforce segmentation and firewall rules.
VPCs with subnets and security groups provide native, software-defined network segmentation and stateful firewall rules that directly replicate on-premises network segmentation and ACLs. Security groups act as virtual firewalls at the instance level, while network ACLs provide subnet-level stateless filtering, together enabling granular control without extending the on-premises network.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a site-to-site VPN between on-premises and cloud to extend the existing network.
Why it's wrong here
A VPN provides encrypted connectivity but does not enforce internal segmentation.
- ✓
Use virtual private clouds (VPCs) with subnets and security groups to enforce segmentation and firewall rules.
Why this is correct
VPCs and security groups directly replicate network segmentation and firewall controls.
- ✗
Implement an intrusion detection and prevention system (IDPS) to monitor traffic.
Why it's wrong here
An IDPS detects/mitigates threats but does not provide network segmentation.
- ✗
Deploy a software-defined WAN (SD-WAN) to manage network traffic between cloud resources.
Why it's wrong here
SD-WAN optimizes WAN connectivity, not internal network segmentation.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.