The correct action is to enable Bidirectional Forwarding Detection (BFD) on the virtual interfaces. BFD provides sub-second failure detection by sending rapid hello packets between the on-premises router and the AWS Direct Connect endpoint, allowing the team to quickly pinpoint whether intermittent packet loss and latency spikes stem from a link-level issue on the customer side or a routing convergence problem on the AWS side. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this scenario tests your understanding of how BFD complements BGP to accelerate fault isolation in hybrid networking—a common trap is confusing BFD with bandwidth scaling or ASN changes, which do not diagnose transient connectivity problems. Remember that BFD is not a routing protocol; it is a lightweight, fast-failure detection mechanism that works alongside BGP to reduce convergence time. Memory tip: BFD = “Be Fast Detecting” link health, not fixing bandwidth.
ANS-C01 Network Management and Operations Practice Question
This ANS-C01 practice question tests your understanding of network management and operations. 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 uses AWS Direct Connect to connect its on-premises data center to a VPC. The network team notices intermittent packet loss and latency spikes during peak hours. Which action should the team take to diagnose the issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Bidirectional Forwarding Detection (BFD) on the virtual interfaces
Option B is correct because enabling Bidirectional Forwarding Detection (BFD) on the virtual interfaces allows rapid detection of connectivity failures, which can help isolate whether the issue is on the AWS side or the customer side. Option A is wrong because increasing bandwidth may not resolve intermittent issues caused by routing problems. Option C is wrong because changing the private ASN does not affect performance. Option D is wrong because tagging does not impact network performance.
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.
✗
Increase the bandwidth of the Direct Connect connection
Why it's wrong here
Increasing bandwidth addresses capacity, not intermittent issues.
✓
Enable Bidirectional Forwarding Detection (BFD) on the virtual interfaces
Read the scenario before looking for a memorised answer.
✗
Apply a tag to the Direct Connect connection for monitoring
Why it's wrong here
Tags are for resource management, not monitoring.
✗
Change the private ASN on the customer router
Why it's wrong here
Changing ASN does not affect performance.
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.
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.
Network Management and Operations — This question tests Network Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable Bidirectional Forwarding Detection (BFD) on the virtual interfaces — Option B is correct because enabling Bidirectional Forwarding Detection (BFD) on the virtual interfaces allows rapid detection of connectivity failures, which can help isolate whether the issue is on the AWS side or the customer side. Option A is wrong because increasing bandwidth may not resolve intermittent issues caused by routing problems. Option C is wrong because changing the private ASN does not affect performance. Option D is wrong because tagging does not impact network performance.
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.
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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
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