Question

improves security through control of the connections between hosts
and storage array

Answer 1

Virtual SAN

Storage Area Networks have historically tended to be rather proprietary and used dedicated hardware and protocols that did not easily interoperate. Though many SAN implementations now leverage protocols such as FCoE, FCIP, or iSCSI that can allow for converged traditional networking technologies and protocols, the scalability and security of the Storage Area Networking has often proven cumbersome.

Traditional approaches to storage security often required hard-coding changes at switches or the HBAs to achieve access control. One approach to a virtual SAN feels analogous to the switching concept of VLANs and tries to allow for a conceptually simplistic approach to isolation within the SAN. This concept of the virtual SAN as analogous to VLANs is most commonly employed by networking vendors.

The concept of a virtual SAN is not limited to simply security considerations from networking vendors. Much recent use of the term virtual SAN leans heavily on the virtual side of the phrase. Virtualization vendors employ the term virtual SAN to imply an approach to the SAN that allows for more rapid provisioning of virtualized storage. Beyond provisioning, virtualization vendors tout the virtual SAN as a means to leverage virtualization to afford simpler linear scalability to the storage area network.

Explanation:

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