ANS-C01 Network Management and Operations Practice Question
A network engineer is configuring AWS Client VPN for remote access. The engineer creates a Client VPN endpoint and associates it with a target network (subnet) in the VPC. After associating, clients can connect to the VPN but cannot access resources in the VPC. The security groups and network ACLs allow all traffic. What is the most likely issue?
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
✓
The Client VPN endpoint's route table does not include a route to the VPC CIDR
The Client VPN endpoint's route table must include a route to the VPC CIDR for traffic from clients to reach VPC resources. Without this route, packets are not forwarded to the VPC. Option A is incorrect because the subnet association is properly done; the endpoint is associated with a subnet. Option B is incorrect because a client CIDR overlap would cause routing conflicts, but the question states clients can connect but cannot access resources, indicating the VPN tunnel is established. Option C is incorrect because authorization rules control access to specific networks (e.g., security groups), but if no route exists, traffic won't reach the VPC even with authorization rules.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The Client VPN endpoint is not associated with a subnet in the VPC
Why it's wrong here
It is associated with a target network.
- ✗
The client CIDR range overlaps with the VPC CIDR
Why it's wrong here
Overlap would cause routing conflicts, but not necessarily prevent access.
- ✗
The Client VPN endpoint does not have an authorization rule to allow access to the VPC CIDR
Why it's wrong here
Authorization rules control access, but without a route, traffic cannot reach the VPC.
- ✓
The Client VPN endpoint's route table does not include a route to the VPC CIDR
Why this is correct
A route must be added to direct traffic to the VPC.
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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.