NS0-155 · Question #130
Host multi-pathing describes a ____________ solution that has at least two distinct ______________ paths to a LUN.
The correct answer is D. FC or IP SAN, Physical. Fiber Channel (FC), FCoE and iSCSI encapsulate SCSI-3. FCoE and iSCSI further encapsulate the transport within IP; hence the term IP SAN. In computer storage, multipath I/O is a fault-tolerance and performance enhancement technique whereby there is more than one physical path…
Question
Host multi-pathing describes a ____________ solution that has at least two distinct ______________ paths to a LUN.
Options
- AToken ring, physical
- BFC SAN, virtual
- CFC or IP SAN, virtual
- DFC or IP SAN, Physical
How the community answered
(58 responses)- A5% (3)
- B2% (1)
- C12% (7)
- D81% (47)
Explanation
Fiber Channel (FC), FCoE and iSCSI encapsulate SCSI-3. FCoE and iSCSI further encapsulate the transport within IP; hence the term IP SAN. In computer storage, multipath I/O is a fault-tolerance and performance enhancement technique whereby there is more than one physical path between the CPU in a computer system and its mass storage devices through the buses, controllers, switches, and bridge devices connecting A simple example would be a SCSI disk connected to two SCSI controllers on the same computer or a disk connected to two Fibre Channel ports. Should one controller, port or switch fail, the operating system can route I/O through the remaining controller transparently to the application, with no changes visible to the applications, other than perhaps incremental latency.
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