Refer iDRAC User Guide (Refer Section "iDRAC6 Express Management Features" and "iDRAC6 Enterprise and vFlash Media") which will have more details on features supported in iDRAC express and Enterprise. Link for iDRAC6 User Guide [URL] 
I was told I could use an iDrac card in my T310 for remote access capabilities.  I could use some guidance on which one I should use.  I searched eBay and Amazon and the ones I've found have a part # of Y383M or JPMJ3. On Dell's site the part # is 330-5946: Another confusion is that some of the ones pictured have a rj45 lan port, and others do not. Thank you
Confusion about which iDrac to use