350-601 Storage Network Practice Question
Which THREE factors should be considered when designing an FCoE SAN to avoid traffic loss? (Choose three.)
⚠ Common exam trap
Cisco often tests the misconception that cut-through switching or disabling FIP snooping improves performance, when in fact these actions compromise lossless behavior or security in an FCoE design.
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
✓
Enable priority flow control (PFC) on all FCoE-enabled interfaces.
Priority Flow Control (PFC) is essential in an FCoE SAN because it provides a lossless Ethernet fabric by pausing traffic on a per-priority basis. Without PFC, standard Ethernet congestion mechanisms would drop FCoE frames, which violates the lossless requirement of Fibre Channel traffic. Enabling PFC on all FCoE-enabled interfaces ensures that buffer credits are managed correctly and no frames are discarded due to congestion.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use standard Ethernet cut-through switching for all FCoE traffic.
Why it's wrong here
Cut-through may cause errors; store-and-forward is recommended.
- ✓
Enable priority flow control (PFC) on all FCoE-enabled interfaces.
Why this is correct
PFC is essential to prevent frame loss due to congestion.
- ✓
Use a dedicated FCoE VLAN that is not used for any other traffic.
Why this is correct
Separation avoids interference with other traffic.
- ✗
Disable the FIP snooping feature to reduce latency.
Why it's wrong here
FIP snooping is required for security; disabling can cause issues.
- ✓
Ensure that the FCoE Maximum Transmission Unit (MTU) is set to 2500 bytes.
Why this is correct
FCoE requires jumbo frames; MTU should be at least 2500 bytes.
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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.