350-601 Storage Network Practice Question
An engineer is configuring a storage network with FCoE and must ensure that the FCoE traffic does not interfere with standard LAN traffic. Which two mechanisms should be implemented?
⚠ Common exam trap
Test-takers frequently think disabling flow control (Option B) is necessary to avoid interference, but FCoE actually requires flow control (PFC) to be enabled, and the key is to isolate it to a dedicated VLAN.
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 PFC on the FCoE VLAN.
FCoE requires lossless transport to prevent frame drops that would corrupt Fibre Channel frames. Priority Flow Control (PFC), defined by IEEE 802.1Qbb, enables pause frames on a per-priority basis, allowing the FCoE VLAN to be configured as lossless while standard LAN traffic remains best-effort. This ensures FCoE traffic does not interfere with LAN traffic by isolating the flow control behavior.
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 the same VLAN for FCoE and LAN.
Why it's wrong here
Causes interference.
- ✗
Disable flow control on FCoE VLAN.
Why it's wrong here
FCoE needs flow control.
- ✓
Enable PFC on the FCoE VLAN.
Why this is correct
Provides lossless Ethernet.
- ✓
Assign FCoE traffic to a dedicated VLAN.
Why this is correct
Isolates traffic.
- ✗
Use jumbo frames for LAN traffic only.
Why it's wrong here
Not a separation mechanism.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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