Which SCSI terminology is used to describe source and destination nodes?

Which SCSI terminology is used to describe source and destination nodes?
A . hosts and targets
B . initiators and targets
C . HBA and disks
D . initiators and disks
E . HBA and targets

Answer: B

Explanation: In computer data storage, a SCSI initiator is the endpoint that initiates a SCSI session, that is, sends a SCSI command. The initiator usually does not provide any Logical Unit Numbers (LUNs).

On the other hand, a SCSI target is the endpoint that does not initiate sessions, but instead waits for initiators’ commands and provides required input/output data transfers. The target usually provides to the initiators one or more LUNs, because otherwise no read or write command would be possible.

Reference: http://en.wikipedia.org/wiki/SCSI_initiator_and_target