ANS-C01 Network Management and Operations Practice Question

A company is using AWS Direct Connect to connect its on-premises data center to AWS. The network team notices increased latency and packet loss during peak hours. The Direct Connect virtual interface (VIF) is configured as a private VIF to a VPC. What is the MOST likely cause of the issue?

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 VIF bandwidth is insufficient for the traffic volume.

The most likely cause is insufficient VIF bandwidth for the traffic volume. During peak hours, increased traffic can exceed the provisioned bandwidth, causing congestion, which manifests as increased latency and packet loss. Option A is incorrect because jumbo frames (larger MTU) can improve efficiency but not prevent congestion. Option C is incorrect because BGP keepalive timers affect routing convergence, not throughput. Option D is incorrect because a 1500-byte MTU is standard and should not cause issues; the problem arises only during peak hours, indicating a capacity issue.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Jumbo frames are not enabled on the VIF.
Why it's wrong here
Jumbo frames would improve performance, not cause packet loss.
✓
The VIF bandwidth is insufficient for the traffic volume.
Why this is correct
Bursty traffic can exceed the provisioned bandwidth, causing congestion.
✗
The BGP keepalive timer is set too low.
Why it's wrong here
BGP timers affect routing stability, not bandwidth congestion.
✗
The MTU size of the VIF is set to 1500 bytes.
Why it's wrong here
Standard MTU should not cause packet loss unless there is a mismatch.

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ANS-C01 Network Management and Operations Practice Question

Why each option matters

Option-by-option breakdown

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