ANS-C01 Network Management and Operations Practice Question
A company uses AWS Transit Gateway to connect multiple VPCs and on-premises networks. They want to monitor the number of packets dropped due to route table limits. Which CloudWatch metric should they use?
⚠ Common exam trap
Beware of confusing 'BytesDroppedByRouteTable' with the correct packets metric. While both measure drops due to route table limits, 'PacketsDroppedByRouteTable' is the correct metric for packet counts, not bytes.
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
✓
PacketsDroppedByRouteTable
The correct CloudWatch metric to monitor the number of packets dropped due to Transit Gateway route table limits is 'PacketsDroppedByRouteTable'. This metric specifically counts packets dropped because the route table is at capacity. 'BytesDroppedByRouteTable' measures bytes dropped, not packets. Option A ('PacketsIn') tracks incoming packets, not dropped. Option C ('BytesOut') measures outgoing traffic volume. Option D ('BytesDroppedByRouteTable') is the byte equivalent, but the question asks for the number of packets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
PacketsIn
Why it's wrong here
Incorrect. 'PacketsIn' measures incoming packets, not packets dropped due to route table limits.
- ✓
PacketsDroppedByRouteTable
Why this is correct
Incorrect. 'PacketsDroppedByRouteTable' is not a valid CloudWatch metric for Transit Gateway; the correct metric is 'BytesDroppedByRouteTable' or similar.
- ✗
BytesOut
Why it's wrong here
Incorrect. 'BytesOut' measures outgoing traffic volume, not drops.
- ✗
BytesDroppedByRouteTable
Why it's wrong here
Correct. 'BytesDroppedByRouteTable' is a valid metric that monitors bytes dropped due to route table limits, which is the closest available metric to the requirement.
Go deeper
Related to this question
About these practice questions
This ANS-C01 question is part of Courseiva's 1,621-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.