350-601 Storage Network Practice Question
During a SAN performance analysis, a Fibre Channel link shows a high number of CRC errors. The link operates at 16 Gbps over a 10 km dark fiber. Which corrective action is least likely to resolve 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
✓
Increase the buffer-to-buffer credit count on the link.
CRC errors are physical layer issues caused by signal integrity problems such as dirty connectors, wrong fiber type, or excessive distance. Increasing the buffer-to-buffer credit count adjusts flow control and does not address signal integrity, making it the least likely to resolve CRC errors. The other options—replacing with single-mode fiber if multimode is used, cleaning connectors, and verifying SFP+ optics—directly target physical layer issues and are more likely to help.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Increase the buffer-to-buffer credit count on the link.
Why this is correct
Buffer credits affect flow control, not physical errors.
- ✗
Replace the fiber cable with a single-mode fiber cable if multimode is used.
Why it's wrong here
Multimode over long distances causes errors.
- ✗
Clean all fiber connectors and inspect for damage.
Why it's wrong here
Dirty connectors are a common cause of CRC errors.
- ✗
Verify that the SFP+ optics match the fiber type and distance.
Why it's wrong here
Mismatched optics can cause errors.
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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.