- A
The VLAN ID is mismatched between the customer router and AWS
Why wrong: VLAN mismatch would cause loss of connectivity.
- B
The bandwidth limit of the virtual interface is being exceeded
Congestion causes packet drops and increased latency.
- C
Jumbo frames are not enabled on the customer router
Why wrong: Jumbo frames reduce overhead and latency.
- D
BGP keepalive timers are set too high
Why wrong: BGP timers affect session stability, not latency.
Question 481 of 1,705
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 troubleshooting high latency on an AWS Direct Connect connection. The network team notices that the latency increases during peak hours. The connection uses a single virtual interface (VIF) with a 1 Gbps capacity. What is the MOST likely cause of the latency?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
✓
The bandwidth limit of the virtual interface is being exceeded
The most likely cause of increased latency during peak hours is that the bandwidth limit of the virtual interface (VIF) is being exceeded. When traffic approaches or surpasses the 1 Gbps capacity, the router's egress queue begins to fill, causing packet buffering and queuing delay. This queuing delay directly manifests as higher round-trip time (RTT) and is a classic symptom of link saturation.
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.
- ✗
The VLAN ID is mismatched between the customer router and AWS
Why it's wrong here
VLAN mismatch would cause loss of connectivity.
- ✓
The bandwidth limit of the virtual interface is being exceeded
Why this is correct
Congestion causes packet drops and increased latency.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Jumbo frames are not enabled on the customer router
Why it's wrong here
Jumbo frames reduce overhead and latency.
- ✗
BGP keepalive timers are set too high
Why it's wrong here
BGP timers affect session stability, not latency.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse bandwidth saturation with configuration errors like VLAN mismatches or MTU issues, but only saturation explains the correlation with peak hours and the gradual latency increase.
Detailed technical explanation
How to think about this question
When a 1 Gbps VIF becomes saturated, packets are enqueued in the router's hardware or software queue. The queue depth grows as traffic exceeds the line rate, and each packet must wait for preceding packets to be transmitted, introducing variable queuing delay. This is described by the M/M/1 queuing model, where average delay = 1/(μ - λ); as arrival rate λ approaches service rate μ, delay approaches infinity. In AWS Direct Connect, the VIF bandwidth is policed at the AWS side, so exceeding it causes drops or buffering depending on the customer router's configuration.
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.
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: The bandwidth limit of the virtual interface is being exceeded — The most likely cause of increased latency during peak hours is that the bandwidth limit of the virtual interface (VIF) is being exceeded. When traffic approaches or surpasses the 1 Gbps capacity, the router's egress queue begins to fill, causing packet buffering and queuing delay. This queuing delay directly manifests as higher round-trip time (RTT) and is a classic symptom of link saturation.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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.