350-601 Compute Practice Question
A UCS B-Series blade server shows high CPU latency when processing network I/O. The engineer suspects a bottleneck in the I/O subsystem. Which metric in UCS Manager should be examined first?
⚠ Common exam trap
Cisco often tests the distinction between utilization metrics (which show load) and error metrics (which show health), so candidates mistakenly pick vNIC utilization thinking high usage equals a bottleneck, when the real issue is physical-layer errors causing retransmissions.
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
✓
Fabric port error counts
Fabric port error counts directly reflect physical-layer issues (e.g., CRC errors, alignment errors, link flaps) that cause retransmissions and backpressure, leading to high CPU latency on the blade server. In UCS Manager, these counters are the first place to check when suspecting an I/O subsystem bottleneck because they pinpoint problems in the fabric interconnect or cabling before examining higher-layer metrics.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
vNIC utilization percentage
Why it's wrong here
Utilization shows load but not latency
- ✓
Fabric port error counts
Why this is correct
Errors cause retransmissions and latency
- ✗
Memory usage statistics
Why it's wrong here
Memory is not directly I/O related
- ✗
Power consumption per server
Why it's wrong here
Power consumption is not a performance metric
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco 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 350-601 exam.