- A
Enable load balancing on the VPN connection in the AWS console.
Why wrong: AWS VPN does not have a load balancing option; load balancing is achieved via BGP.
- B
Configure static routes for the second tunnel.
Why wrong: Static routes would not allow dynamic load balancing; BGP is already in use.
- C
Assign different BGP ASNs to each tunnel.
Why wrong: Both tunnels should use the same ASN for the customer gateway.
- D
Advertise the same BGP prefixes over both tunnels from the on-premises router.
This allows AWS to load balance traffic across both tunnels.
Question 824 of 1,705
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company has a VPN connection between an on-premises network and AWS using two tunnels for redundancy. The BGP sessions are established, but traffic is only flowing through one tunnel. The engineer wants to ensure both tunnels are actively used. What should be configured?
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
✓
Advertise the same BGP prefixes over both tunnels from the on-premises router.
Option D is correct because when both tunnels advertise the same BGP prefixes, the AWS VPN endpoint will see equal-cost paths and load-balance traffic across both tunnels using ECMP (Equal-Cost Multi-Path) routing. This ensures active-active utilization of both tunnels, which is the standard design for AWS VPN redundancy.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 load balancing on the VPN connection in the AWS console.
Why it's wrong here
AWS VPN does not have a load balancing option; load balancing is achieved via BGP.
- ✗
Configure static routes for the second tunnel.
Why it's wrong here
Static routes would not allow dynamic load balancing; BGP is already in use.
- ✗
Assign different BGP ASNs to each tunnel.
Why it's wrong here
Both tunnels should use the same ASN for the customer gateway.
- ✓
Advertise the same BGP prefixes over both tunnels from the on-premises router.
Why this is correct
This allows AWS to load balance traffic across both tunnels.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume AWS VPN requires manual load balancing (Option A) or that static routes are needed for the second tunnel (Option B), when in fact BGP multipath with identical prefix advertisements is the correct method to achieve active-active utilization.
Detailed technical explanation
How to think about this question
Under the hood, AWS VPN endpoints use BGP multipath to install both paths into the routing table when the same prefix is received with equal AS_PATH length and MED. In a real-world scenario, if the on-premises router advertises different prefixes per tunnel (e.g., a /24 on tunnel 1 and a /24 on tunnel 2), AWS will only use the tunnel with the more specific route or best path, leaving the other idle. Advertise the same exact prefixes (including the same prefix length) over both BGP sessions to trigger ECMP.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Advertise the same BGP prefixes over both tunnels from the on-premises router. — Option D is correct because when both tunnels advertise the same BGP prefixes, the AWS VPN endpoint will see equal-cost paths and load-balance traffic across both tunnels using ECMP (Equal-Cost Multi-Path) routing. This ensures active-active utilization of both tunnels, which is the standard design for AWS VPN redundancy.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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