- A
Enable jumbo frames on the transit gateway and the EC2 instances in the private subnets.
Enable jumbo frames on the transit gateway and EC2 instances to allow larger MTU, reducing fragmentation and packet loss. This is the first step to address MTU-related issues.
- B
Increase the VPN tunnel bandwidth by creating a second VPN tunnel and enabling ECMP.
Why wrong: Increasing bandwidth by adding a second VPN tunnel with ECMP does not resolve packet loss due to MTU mismatch; it only adds capacity.
- C
Modify the BGP attributes on the transit gateway to prefer the Direct Connect path once it becomes available.
Why wrong: Modifying BGP attributes for Direct Connect is premature because Direct Connect is not available; the issue is likely MTU-related, not routing.
- D
Rebuild the VPN connection using a different customer gateway device with stronger encryption.
Why wrong: Rebuilding the VPN connection with stronger encryption does not address the high latency and packet loss caused by MTU fragmentation.
ANS-C01 Jumbo frames 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. A key principle to apply: jumbo frames. 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 global e-commerce company operates a production environment on AWS with a VPC (10.0.0.0/16) containing public and private subnets in three Availability Zones. The application runs on EC2 instances in private subnets behind an Application Load Balancer (ALB) in public subnets. The company uses AWS Transit Gateway to connect multiple VPCs and on-premises data centers via Site-to-Site VPN. Recently, the operations team noticed intermittent connectivity issues: users in the Asia-Pacific region experience slow page load times and occasional timeouts, while users in other regions have no issues. The network team suspects packet loss or high latency on the VPN connection to the on-premises data center in Singapore, which hosts a critical database. The AWS Direct Connect connection is not yet available. The team ran a traceroute from an EC2 instance in the production VPC to the database server (IP 203.0.113.50) and observed high latency and packet loss on the fifth hop (a transit gateway attachment). The VPN tunnel status shows 'UP' on both ends. CloudWatch metrics for the VPN tunnel show no errors but high 'TunnelData' bytes. What should the network engineer do FIRST to resolve the issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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
Enable jumbo frames on the transit gateway and the EC2 instances in the private subnets.
Option A is correct because enabling jumbo frames on the transit gateway and EC2 instances allows larger MTU, reducing packet fragmentation and the associated packet loss and latency. The high 'TunnelData' bytes and packet loss on the attachment suggest MTU mismatch. Option B is incorrect because adding a second VPN tunnel with ECMP increases bandwidth but does not fix MTU issues. Option C is incorrect because Direct Connect is not available yet and the problem is not routing. Option D is incorrect because stronger encryption does not affect MTU.
Key principle: Jumbo frames
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 jumbo frames on the transit gateway and the EC2 instances in the private subnets.
Why this is correct
Enable jumbo frames on the transit gateway and EC2 instances to allow larger MTU, reducing fragmentation and packet loss. This is the first step to address MTU-related issues.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Jumbo frames
- ✗
Increase the VPN tunnel bandwidth by creating a second VPN tunnel and enabling ECMP.
- ✗
Modify the BGP attributes on the transit gateway to prefer the Direct Connect path once it becomes available.
- ✗
Rebuild the VPN connection using a different customer gateway device with stronger encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates might think that increasing bandwidth (option B) is the solution, but the problem is likely MTU-related packet loss, not bandwidth limitation.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Jumbo frames
- MTU (Maximum Transmission Unit)
- Transit Gateway attachment
- VPN tunnel
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
Jumbo frames
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review jumbo frames, then practise related ANS-C01 questions on the same topic to reinforce the concept.
- →
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 — Jumbo frames.
What is the correct answer to this question?
The correct answer is: Enable jumbo frames on the transit gateway and the EC2 instances in the private subnets. — Option A is correct because enabling jumbo frames on the transit gateway and EC2 instances allows larger MTU, reducing packet fragmentation and the associated packet loss and latency. The high 'TunnelData' bytes and packet loss on the attachment suggest MTU mismatch. Option B is incorrect because adding a second VPN tunnel with ECMP increases bandwidth but does not fix MTU issues. Option C is incorrect because Direct Connect is not available yet and the problem is not routing. Option D is incorrect because stronger encryption does not affect MTU.
What should I do if I get this ANS-C01 question wrong?
Review jumbo frames, then practise related ANS-C01 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Jumbo frames
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: Jun 20, 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.