Using Hardware iSCSI Initiators with ESX/ESXi hosts allows which of the following tasks to be offloaded from the VMkernel? Select all that apply-

A.
Issuing SCSI commands to the virtual disk

B.
Mapping requests for blocks on the virtual disk to blocks on the appropriate physical device

C.
Encapsulation of iSCSI PDUs into TCP/IP packets

D.
Encapsulation of I/O requests into iSCSI Protocol Data Units (PDUs)

Explanation:

iSCSI SAN Configuration Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, page 19.

If the iSCSI initiator is a hardware iSCSI initiator (iSCSI HBA), the HBA performs the following tasks.
Encapsulates I/O requests into iSCSI Protocol Data Units (PDUs). [D above]

Encapsulates PDUs into TCP/IP packets. [C above]
Sends IP packets over Ethernet to the iSCSI storage system.