ANS-C01 Network Implementation Practice Question
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?
⚠ Common exam trap
Watch out — candidates often 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.
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.
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.
- ✗
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.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.