ANS-C01 Network Implementation Practice Question
A company uses AWS Client VPN for remote access. Users report intermittent disconnections. The network engineer notices that the Client VPN endpoint is associated with a single subnet. What change should be made to improve reliability?
⚠ Common exam trap
Test-takers frequently confuse scaling (increasing CIDR or route tables) with high availability, failing to recognize that a single subnet creates a single point of failure for the entire Client VPN endpoint.
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
✓
Associate the Client VPN endpoint with subnets in at least two Availability Zones.
Associating the Client VPN endpoint with subnets in at least two Availability Zones provides high availability for the VPN tunnel endpoints. If a single subnet (and its underlying AZ) fails or experiences network issues, the Client VPN endpoint can still route traffic through the other AZ's subnet, preventing the intermittent disconnections users are experiencing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Split the client CIDR into smaller ranges for each Availability Zone.
Why it's wrong here
Not necessary; the endpoint handles client IP assignment.
- ✓
Associate the Client VPN endpoint with subnets in at least two Availability Zones.
Why this is correct
Provides redundancy if one AZ fails.
- ✗
Create multiple route tables for the same subnet.
Why it's wrong here
Only one route table can be associated with a subnet.
- ✗
Increase the subnet CIDR size to accommodate more clients.
Why it's wrong here
More IP addresses do not fix disconnections due to AZ failure.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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