ANS-C01 Network Security, Compliance and Governance Practice Question
Which TWO of the following are best practices for securing a VPC?
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 multiple Availability Zones for redundancy.
(Use multiple Availability Zones) is correct because it provides redundancy and improves availability, which is a key security best practice by ensuring fault tolerance. Option D (Restrict inbound SSH access to specific IP ranges) is correct as it minimizes the attack surface by limiting administrative access to authorized IPs only. Option A is wrong: VPC Flow Logs capture IP traffic information but do not block traffic; they are used for monitoring and analysis, not as a security control. Option C is wrong: placing databases in public subnets exposes them to the internet, increasing risk; they should be in private subnets with controlled access. Option E is wrong: the default VPC security group allows all inbound traffic, which is overly permissive; custom security groups should be used to implement least privilege.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable VPC Flow Logs on all subnets to block malicious traffic.
Why it's wrong here
Flow logs only capture metadata, do not block.
- ✓
Use multiple Availability Zones for redundancy.
Why this is correct
Improves availability and fault tolerance.
- ✗
Place database instances in public subnets for easier management.
Why it's wrong here
Databases should be in private subnets.
- ✓
Restrict inbound SSH access to specific IP ranges.
Why this is correct
Least privilege principle.
- ✗
Use the default VPC security group for all instances.
Why it's wrong here
Default security group is too permissive.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services 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 ANS-C01 exam.