CCSP Cloud Platform and Infrastructure Security Practice Question
A cloud architect is designing a VPC for a three-tier application. The web servers need to be accessible from the internet, while the application servers should only be reachable from the web servers, and the database servers should be isolated from all other traffic except the application servers. Which VPC design best meets these requirements?
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
✓
Web servers in a public subnet, app servers in a private subnet, databases in an isolated subnet with appropriate security groups
Public subnets for load balancers/web servers, private subnets for app servers, and isolated subnets (no direct route to internet) for databases provide the required isolation and access control.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Web servers in a public subnet, app and database servers in a single private subnet
Why it's wrong here
Databases should be isolated from app servers via separate subnets or security groups.
- ✗
All servers in a private subnet with a NAT gateway
Why it's wrong here
Web servers need direct internet access, which a private subnet cannot provide.
- ✗
All servers in a single public subnet with security groups
Why it's wrong here
This design does not isolate databases from internet exposure.
- ✓
Web servers in a public subnet, app servers in a private subnet, databases in an isolated subnet with appropriate security groups
Why this is correct
This tiered subnet design enforces network isolation between layers.
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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.