What are the two ways a storage system implements virtualization? (Choose two.)

Question

Options

• Ain-band
• Bcross-band
• Ccascaded
• Dout-of-band

• A
  90% (55)
• B
  3% (2)
• C
  7% (4)

Explanation

Storage virtualization is implemented either in-band (A), where the virtualization appliance sits directly in the data path between hosts and storage so all I/O flows through it, or out-of-band (D), where the virtualization device sits outside the data path and handles only metadata/control operations while data moves directly between host and storage. These two placement approaches are the industry-standard classifications recognized by vendors like IBM, EMC, and in storage networking frameworks. Cross-band (B) is not a recognized storage virtualization term - it's a fabricated distractor. Cascaded (C) describes a configuration topology (e.g., daisy-chained switches) but is not a virtualization implementation method.

Memory tip: Think of traffic on a highway - in-band is a toll booth on the road (every car passes through it), while out-of-band is a toll management office beside the road (cars drive freely, the office just tracks them). If it's in the path, it's in-band; if it's off to the side, it's out-of-band.

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