DVI- Digital (DVI-D) Supports digital display only.

DVI- Integrated (DVI- I) Supports both digital and analog display By Joseph Julius (man from Mpwapwa- Tanzania)

You will need a DVI cable. Note that DVI can be a digital signal, an analog signal or both. Look in the manuals the see which the computer and monitor support. It is normally digital, which might be referred to as DVI-D. If analog is supported, it will be called a DVI-A. A DVI connection that carries both will be called a DVI-I.

If you find you have a choice, use the digital signal rather than the analog.

Yes. You can use a DVI 24 plus 5 in a DVI 24 plus 1 port.

Yes will work the same as HDMI, just DVI will not carry audio. DVI is capable of 1080p

dvi is higher quality