i1 Pro2 questions

[Asuma01]

http://www.xrite.com/documents/literature/en/L7-519_i1_Family_2012_en.pdf

What are they talking about when they mention RGB printers compared to CMYK printers?
Would an RGB printer be something equivalent to our office printer like say a HP Deskjet?
The i1 Photo Pro2 says it can profile RGB printers but not CMYK. Can someone clarify?

 

[P Wagner]

Most driver-based desktop printers are considered to be RGB devices from a color management perspective, despite the fact that they have CMYK inks. RIP-based printers are typically CMYK devices.