350-601 Storage Network Practice Question
An administrator notices that a new server connected to a Fibre Channel switch cannot log in. The 'show flogi database' command does not show the server's WWPN. What is the most likely cause?
⚠ Common exam trap
Cisco often tests the distinction between FLOGI rejection (port security, fabric binding) and post-login restrictions (zoning, VSAN membership), so candidates mistakenly choose 'incorrect zoning' because they confuse zoning with port-level authentication.
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
✓
Port security enabled with WWN mismatch
The 'show flogi database' command lists all devices that have successfully completed the Fabric Login (FLOGI) process. If the server's WWPN is absent, it indicates that the FLOGI request was rejected by the switch. Port security with a WWN mismatch is the most likely cause because the switch is configured to allow only specific WWPNs, and the server's WWPN does not match the allowed list, causing the switch to silently drop the FLOGI request without logging the device.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Trunking mode not enabled on the port
Why it's wrong here
Incorrect: Trunking is for VSAN tagging, not login.
- ✗
Incorrect zoning configuration
Why it's wrong here
Incorrect: Zoning only affects device discovery after login.
- ✗
Speed mismatch between the server and switch
Why it's wrong here
Incorrect: Speed mismatch prevents link establishment, not specifically FLOGI.
- ✓
Port security enabled with WWN mismatch
Why this is correct
Correct: Port security restricts which WWNs can log in.
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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.