- A
Set a higher local preference on the VPN route to make it preferred over Direct Connect.
Why wrong: The VPN should be a backup, so it should have lower local preference.
- B
Configure the VPN connection with static routes instead of BGP.
Why wrong: Static routes do not provide dynamic failover based on BGP attributes.
- C
Disable route propagation on the VPN connection's route table.
Why wrong: Disabling propagation would remove the VPN routes, preventing failover.
- D
Adjust BGP attributes on the Direct Connect routes to be preferred over the VPN routes.
By making Direct Connect routes more preferred (e.g., higher local preference), the VPN will only be used when Direct Connect is down.
- E
Use a VPN connection that supports dynamic BGP routing.
BGP allows dynamic route advertisement and automatic failover.
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is designing a hybrid network using AWS Direct Connect and a Site-to-Site VPN as a backup. The company has two Direct Connect connections from different providers for redundancy. The company wants to use BGP to automatically fail over to the VPN if both Direct Connect connections fail. Which TWO configurations are required to achieve this?
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
Adjust BGP attributes on the Direct Connect routes to be preferred over the VPN routes.
Option D is correct because setting a higher local preference on Direct Connect routes makes them more preferred over VPN routes under normal conditions. Option E is correct because dynamic BGP routing on the VPN is required to allow automatic failover and route advertisement when Direct Connect fails, enabling BGP to withdraw routes and trigger failover.
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 on the VPN route to make it preferred over Direct Connect.
Why it's wrong here
The VPN should be a backup, so it should have lower local preference.
- ✗
Configure the VPN connection with static routes instead of BGP.
Why it's wrong here
Static routes do not provide dynamic failover based on BGP attributes.
- ✗
Disable route propagation on the VPN connection's route table.
Why it's wrong here
Disabling propagation would remove the VPN routes, preventing failover.
- ✓
Adjust BGP attributes on the Direct Connect routes to be preferred over the VPN routes.
Why this is correct
By making Direct Connect routes more preferred (e.g., higher local preference), the VPN will only be used when Direct Connect is down.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use a VPN connection that supports dynamic BGP routing.
Why this is correct
BGP allows dynamic route advertisement and automatic failover.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The ANS-C01 exam often tests the misconception that you should set a higher local preference on the backup path (VPN) to make it preferred, but the correct approach is to make the primary path (Direct Connect) more preferred so that failover occurs only when the primary is unavailable.
Detailed technical explanation
How to think about this question
BGP local preference is an attribute used within an AS to influence outbound traffic; a higher value is preferred. In this scenario, Direct Connect routes should have a higher local preference (e.g., 200) than VPN routes (e.g., 100) to ensure Direct Connect is the primary path. When both Direct Connect connections fail, BGP sessions drop, routes are withdrawn, and the VPN routes (with lower local preference) become active automatically. The VPN must use dynamic BGP (not static) to advertise routes and support route withdrawal upon failure.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: Adjust BGP attributes on the Direct Connect routes to be preferred over the VPN routes. — Option D is correct because setting a higher local preference on Direct Connect routes makes them more preferred over VPN routes under normal conditions. Option E is correct because dynamic BGP routing on the VPN is required to allow automatic failover and route advertisement when Direct Connect fails, enabling BGP to withdraw routes and trigger failover.
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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