- A
Set a higher local preference value on the on-premises router for the Direct Connect route.
Why wrong: Wrong: Local preference is a Cisco concept, not applicable to AWS.
- B
Update the VPC route table to give higher priority to the Direct Connect route.
Why wrong: Wrong: VPC route tables do not affect BGP path selection.
- C
Set a lower MED value on the Direct Connect virtual interface.
Why wrong: Wrong: MED is not typically used for this scenario.
- D
Configure the on-premises router to prepend AS path for routes advertised over the VPN connection.
Correct: AS path prepending makes VPN path less preferred.
Question 114 of 1,705
ANS-C01 Network Security, Compliance and Governance Practice Question
This ANS-C01 practice question tests your understanding of network security, compliance and governance. 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 Direct Connect connection to AWS with a private VIF to a VPC. They also have a VPN connection as a backup. The BGP sessions are established. They want to ensure that traffic from on-premises to the VPC prefers the Direct Connect path over the VPN. The on-premises router is advertising the same prefix to both connections. What should the network engineer configure on the AWS side?
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
✓
Configure the on-premises router to prepend AS path for routes advertised over the VPN connection.
To prefer the Direct Connect path over the VPN for traffic from on-premises to the VPC, the on-premises router should prepend its AS number multiple times for the routes advertised over the VPN connection. This increases the AS path length, making the Direct Connect path more preferred. AWS does not allow manipulation of BGP attributes on the customer side of the Direct Connect or VPN connections, so the change must be made on the on-premises router. Option A is incorrect because local preference is a Cisco-specific feature and affects outbound traffic, not inbound. Option B is incorrect because VPC route tables only apply to traffic inside the VPC, not to BGP path selection. Option C is incorrect because MED is typically used to influence outbound traffic from AWS to on-premises and is not as effective as AS path prepending for this scenario.
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.
- ✗
Set a higher local preference value on the on-premises router for the Direct Connect route.
Why it's wrong here
Wrong: Local preference is a Cisco concept, not applicable to AWS.
- ✗
Update the VPC route table to give higher priority to the Direct Connect route.
Why it's wrong here
Wrong: VPC route tables do not affect BGP path selection.
- ✗
Set a lower MED value on the Direct Connect virtual interface.
Why it's wrong here
Wrong: MED is not typically used for this scenario.
- ✓
Configure the on-premises router to prepend AS path for routes advertised over the VPN connection.
Why this is correct
Correct: AS path prepending makes VPN path less preferred.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Scenario analysis trap
Wrong: MED is not typically used for this scenario.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Security, Compliance and Governance — This question tests Network Security, Compliance and Governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the on-premises router to prepend AS path for routes advertised over the VPN connection. — To prefer the Direct Connect path over the VPN for traffic from on-premises to the VPC, the on-premises router should prepend its AS number multiple times for the routes advertised over the VPN connection. This increases the AS path length, making the Direct Connect path more preferred. AWS does not allow manipulation of BGP attributes on the customer side of the Direct Connect or VPN connections, so the change must be made on the on-premises router. Option A is incorrect because local preference is a Cisco-specific feature and affects outbound traffic, not inbound. Option B is incorrect because VPC route tables only apply to traffic inside the VPC, not to BGP path selection. Option C is incorrect because MED is typically used to influence outbound traffic from AWS to on-premises and is not as effective as AS path prepending for this scenario.
What should I do if I get this ANS-C01 question wrong?
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 20, 2026
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