ANS-C01 Network Management and Operations Practice Question
A network engineer is troubleshooting high latency on an AWS Direct Connect connection. The engineer checks the CloudWatch metrics for the virtual interface and sees that 'ConnectionBpsEgress' and 'ConnectionBpsIngress' are both below 50% of the provisioned bandwidth. Which additional metric should be examined to identify potential bufferbloat?
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
✓
PauseFrames (802.3x flow control frames)
(PauseFrames) is correct because PauseFrames indicate that the link is being flow-controlled due to congestion, which can cause bufferbloat. High pause frame counts suggest the local device is forcing the remote device to pause transmission, leading to increased latency. Option A is incorrect because CRAM is a security protocol, not a network metric. Option B is incorrect because detailed latency metrics are not available for Direct Connect virtual interfaces. Option D is incorrect because CRC errors indicate physical layer issues, not bufferbloat.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
CRAM (Challenge-Response Authentication Mechanism) handshake failures
Why it's wrong here
CRAM is used for authentication, not for bufferbloat.
- ✗
Latency metrics from Amazon CloudWatch
Why it's wrong here
CloudWatch does not provide latency metrics for Direct Connect virtual interfaces.
- ✓
PauseFrames (802.3x flow control frames)
Why this is correct
High pause frames indicate congestion and bufferbloat.
- ✗
CRC errors on the physical connection
Why it's wrong here
CRC errors indicate physical layer problems, not bufferbloat.
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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.