350-601 Storage Network Practice Question
Which FCoE component is responsible for encapsulating Fibre Channel frames into Ethernet frames?
⚠ Common exam trap
Cisco often tests the distinction between the component that performs encapsulation (FCoE module) and the logical interfaces or forwarding entities (VFC, VN, FCF) that rely on that encapsulation, leading candidates to confuse the control-plane role of the FCF or the logical nature of VFC/VN interfaces with the actual encapsulation function.
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
✓
FCoE module on the switch or adapter
The FCoE module on the switch or adapter is the component that performs the encapsulation of native Fibre Channel frames into Ethernet frames. This module handles the conversion by adding an Ethernet header, including the EtherType 0x8906 for FCoE, and managing the mapping of Fibre Channel constructs (e.g., VSANs) to VLANs. Without this module, Fibre Channel traffic cannot traverse an Ethernet network.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
FCoE module on the switch or adapter
Why this is correct
The FCoE module performs encapsulation/decapsulation.
- ✗
FCoE Forwarder (FCF)
Why it's wrong here
FCF forwards FCoE frames, but encapsulation is done by the endpoint.
- ✗
Virtual Fibre Channel interface (VFC)
Why it's wrong here
VFC is a logical interface, not the encapsulator.
- ✗
VN interface
Why it's wrong here
VN interface is a virtual N-port.
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