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352-001 · Question #280
352-001 Question #280: Real Exam Question with Answer & Explanation
The correct answer is A: reduces the amount of domain IDs that are used in the fabric. N-Port Virtualization (NPV) mode allows access-layer switches to proxy end-device logins through an upstream NPIV-enabled switch, eliminating the need for the NPV switch to obtain its own Fibre Channel fabric domain ID.
Question
Which option is a benefit of using N-Port Virtualization?
Options
- Areduces the amount of domain IDs that are used in the fabric
- Bdoes not need to create zoning
- Creduces latency when using local switching on Fibre Channel ports
- Dallows trunking to the upstream switch
- Edoes not need to configure the upstream switches
Explanation
N-Port Virtualization (NPV) mode allows access-layer switches to proxy end-device logins through an upstream NPIV-enabled switch, eliminating the need for the NPV switch to obtain its own Fibre Channel fabric domain ID.
Common mistakes.
- B. Zoning must still be configured on the upstream core or director switches to control access between initiators and targets; NPV mode proxies login requests but does not eliminate the zoning requirement in the fabric.
- C. NPV mode disables local switching, meaning all traffic - even between devices on the same NPV switch - must traverse to the upstream core switch and back, which increases latency rather than reducing it.
- D. Trunking on an NPV switch requires the upstream switch to support NPIV trunking and is configured as a separate feature; NPV mode alone does not enable or guarantee trunking capability.
- E. The upstream switches must be explicitly configured to support NPIV so they can accept proxy FLOGI requests from the NPV switch; upstream configuration is a prerequisite, not an optional step.
Concept tested. N-Port Virtualization domain ID reduction in SAN fabrics
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