- A
Prepend the AS path on the Direct Connect BGP advertisement.
Correct. Prepending the AS path on the Direct Connect BGP advertisement increases the AS path length, making the Direct Connect route less preferred compared to the VPN route on the on-premises router, steering traffic to the VPN.
- B
Advertise the specific prefix 10.0.1.0/24 from the VPN connection to the VPC.
Why wrong: Incorrect. This option states the wrong direction. To steer traffic from on-premises to the VPC subnet, the VPC should advertise the specific prefix (10.0.1.0/24) to on-premises via the VPN, not from the VPN to the VPC.
- C
Disable route propagation on the VPN connection's route table.
Why wrong: Incorrect. Disabling route propagation on the VPN connection's route table would prevent VPN routes from being added to the VPC route table, which would not help steer traffic to the VPN; it would actually break connectivity.
- D
Use a BGP community to tag the Direct Connect route as no-export.
Why wrong: Incorrect. Using BGP community 'no-export' on the Direct Connect route prevents that route from being advertised to other BGP peers, but it does not affect the on-premises router's path selection between Direct Connect and VPN.
- E
Set a lower MED value on the VPN route advertisement compared to Direct Connect.
Correct. Setting a lower MED value on the VPN route advertisement makes it more preferred over Direct Connect when all other BGP path attributes are equal, effectively steering traffic to the VPN.
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 with a private VIF to a VPC. The on-premises network advertises the prefix 10.0.0.0/8 to AWS. The VPC has a CIDR of 10.0.0.0/16. A network engineer wants to ensure that traffic from on-premises to a specific subnet 10.0.1.0/24 in the VPC is routed via a dedicated VPN connection instead of Direct Connect for testing purposes. Which TWO actions should the engineer take?
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
Prepend the AS path on the Direct Connect BGP advertisement.
Option A is correct because prepending the AS path on the Direct Connect BGP advertisement makes the Direct Connect path less preferred on the on-premises router due to a longer AS path length, steering traffic to the VPN. Option E is correct because setting a lower MED value on the VPN route advertisement makes it more preferred over Direct Connect when all other BGP path selection criteria are equal. Option B is incorrect because it suggests advertising the specific prefix from the VPN to the VPC, whereas to influence traffic from on-premises, the VPC must advertise the specific prefix to on-premises via the VPN, not the other way around. Options C and D are incorrect: disabling route propagation on the VPN route table would prevent the VPC from learning routes via VPN, and using a BGP community as no-export on Direct Connect does not affect on-premises routing decisions.
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.
- ✓
Prepend the AS path on the Direct Connect BGP advertisement.
Why this is correct
Correct. Prepending the AS path on the Direct Connect BGP advertisement increases the AS path length, making the Direct Connect route less preferred compared to the VPN route on the on-premises router, steering traffic to the VPN.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Advertise the specific prefix 10.0.1.0/24 from the VPN connection to the VPC.
Why it's wrong here
Incorrect. This option states the wrong direction. To steer traffic from on-premises to the VPC subnet, the VPC should advertise the specific prefix (10.0.1.0/24) to on-premises via the VPN, not from the VPN to the VPC.
- ✗
Disable route propagation on the VPN connection's route table.
Why it's wrong here
Incorrect. Disabling route propagation on the VPN connection's route table would prevent VPN routes from being added to the VPC route table, which would not help steer traffic to the VPN; it would actually break connectivity.
- ✗
Use a BGP community to tag the Direct Connect route as no-export.
- ✓
Set a lower MED value on the VPN route advertisement compared to Direct Connect.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think AS path prepending or BGP communities are the primary tools for traffic steering in this scenario, but they overlook the fundamental BGP rule that a more specific prefix always takes precedence over a less specific one, regardless of other attributes.
Detailed technical explanation
How to think about this question
In BGP, the most specific prefix always wins regardless of other path attributes, so advertising 10.0.1.0/24 via VPN overrides the less specific 10.0.0.0/8 from Direct Connect. MED is a hint to influence inbound traffic from a multi-homed peer; a lower MED value is preferred, but it only applies when comparing routes from the same AS. In AWS, VPN and Direct Connect are treated as separate BGP sessions, so MED can be used to prefer one over the other when prefix lengths are equal.
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 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.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Network Implementation — study guide chapter
Learn the concepts, then practise the questions
- →
Network Implementation practice questions
Targeted practice on this topic area only
- →
All ANS-C01 questions
1,705 questions across all exam domains
- →
AWS Certified Advanced Networking Specialty ANS-C01 study guide
Full concept coverage aligned to exam objectives
- →
ANS-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related ANS-C01 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Network Management and Operations practice questions
Practise ANS-C01 questions linked to Network Management and Operations.
Network Security, Compliance and Governance practice questions
Practise ANS-C01 questions linked to Network Security, Compliance and Governance.
Network Design practice questions
Practise ANS-C01 questions linked to Network Design.
Network Implementation practice questions
Practise ANS-C01 questions linked to Network Implementation.
ANS-C01 fundamentals practice questions
Practise ANS-C01 questions linked to ANS-C01 fundamentals.
ANS-C01 scenario practice questions
Practise ANS-C01 questions linked to ANS-C01 scenario.
ANS-C01 troubleshooting practice questions
Practise ANS-C01 questions linked to ANS-C01 troubleshooting.
Practice this exam
Start a free ANS-C01 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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: Prepend the AS path on the Direct Connect BGP advertisement. — Option A is correct because prepending the AS path on the Direct Connect BGP advertisement makes the Direct Connect path less preferred on the on-premises router due to a longer AS path length, steering traffic to the VPN. Option E is correct because setting a lower MED value on the VPN route advertisement makes it more preferred over Direct Connect when all other BGP path selection criteria are equal. Option B is incorrect because it suggests advertising the specific prefix from the VPN to the VPC, whereas to influence traffic from on-premises, the VPC must advertise the specific prefix to on-premises via the VPN, not the other way around. Options C and D are incorrect: disabling route propagation on the VPN route table would prevent the VPC from learning routes via VPN, and using a BGP community as no-export on Direct Connect does not affect on-premises routing decisions.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More ANS-C01 practice questions
- A financial services company has a VPC with a public subnet and a private subnet. EC2 instances in the private subnet ne…
- A company is designing a network security architecture for a multi-account environment using AWS Transit Gateway. The se…
- A company is using AWS Direct Connect to connect its on-premises network to AWS. The company wants to encrypt all traffi…
- A company uses AWS Transit Gateway to connect multiple VPCs and on-premises networks via AWS Site-to-Site VPN. The secur…
- A company runs a web application on EC2 instances behind an Application Load Balancer (ALB). The application must be acc…
- A global e-commerce company uses a hub-and-spoke network topology with a transit VPC in us-east-1. Each spoke VPC has an…
Last reviewed: Jul 4, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.