VMware Certified Professional - Data Center Virtualization (VCP-DCV) Practice Exam

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What is the function of N-Port ID Virtualization in Fibre Channel?

To increase storage bandwidth.
To separate network environments.
To allow multiple instances of devices on the same fabric.
To reduce the number of required switches.

The correct answer is: To allow multiple instances of devices on the same fabric.

N-Port ID Virtualization (NPIV) is a significant feature in Fibre Channel networks that allows multiple instances of devices on the same physical port. This capability enables a single physical N-port (Node port) to register multiple virtual N-ports, each with its own unique identifier. As a result, several virtual devices can share the same physical Fibre Channel connection while maintaining distinct identities and separate sessions on the fabric. This is particularly useful in virtualized environments, where multiple virtual machines may need to access the storage network independently. The feature enhances flexibility in the storage architecture by allowing different applications or virtual machines to connect to storage without the need for additional physical ports on the end switch or extra cabling, thereby optimizing resource usage. The other options do not accurately capture the essence of NPIV; for instance, while bandwidth and network separation are important aspects of storage networking, they do not specifically relate to the virtualization of node identifiers in the context of a shared environment.