Which of the following components must be modified in order to enable
Jumbo Frame support for the Software iSCSI Initiator (Choose Two)?

A.
The virtual machine port group

B.
The iSCSI vmhba

C.
The virtual switch

D.
The VMkernel port

Explanation:
iSCSI SAN Configuration Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, page 30.
If needed, enable Jumbo Frames. Jumbo Frames must be enabled for each vSwitch
through the vSphere CLI. Also, if you use an ESX host, you must create a VMkernel
network interface enabled with Jumbo Frames.