iSCSI is SCSI over IP. Typically you're running iSCSI over copper ethernet cables, which in turn makes it less expensive to provision (including cabling, HBAs, and switches) than fibre channel solutions. The downside is that FC is (currently) faster than iSCSI. Once we get into 10Gb iSCSI the balance will shift, at least for a little while.
In summary, yes those are ethernet ports and they are also iSCSI ports.
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