350-601 Storage Network Practice Question
A storage administrator is troubleshooting a connectivity issue between a server and a storage array over Fibre Channel. The server is connected to an NPV edge switch, which uplinks to a core switch. The server's WWPN is registered in the zone, but the server cannot see the target. The administrator notices that the core switch does not see the server's WWPN in its FC name server database. What is the most likely cause?
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
✓
The NPV edge switch does not register host WWPNs in the core fabric's name server; only the NP-port WWPN is registered
In NPV mode, the edge switch does not propagate WWPNs to the core's name server; instead, the NP-port's WWPN is seen. The core sees the edge switch's NP-port WWPN, not the host's WWPN.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The host is using an incorrect FCID
Why it's wrong here
FCID assignment is automatic; this is not the likely cause.
- ✗
The VSAN mismatch between edge and core switches
Why it's wrong here
A VSAN mismatch would prevent communication, but the symptom is missing WWPN in name server.
- ✓
The NPV edge switch does not register host WWPNs in the core fabric's name server; only the NP-port WWPN is registered
Why this is correct
NPV mode causes the edge switch to proxy the host's login, but the host's WWPN is not registered on the core.
- ✗
The zone set is not activated on the edge switch
Why it's wrong here
Zone set activation is required but does not explain the missing WWPN in core's name server.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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