|I agree with Derek. |
I thought a UDID (unique identifier) was typically an Apple concept.
I guess if you talk in general terms of a UDID you could consider your network card(s) MAC address as its unique identifier, or more so its serial number because MAC addresses can be changed or cloned in some cases. Depending on how you connect to a network there could be 2 or more because of Ethernet, wireless and I guess even bluetooth connectivity technologies.
Because hardware can be changed, such as network cards, this would make the UDID principle breakdown because it is meant to encompass the entire hardware setup as a whole (I would think).
I'm kind of thinking in vague logic here, so I could be way off base.
Hopefully someone can add more to this discussion.
Can I ask why you've raised this question?