As for the nodes:
Network nodes - transactional network clients. They compete with each other by locking an arbitrary amount for the generating and proposing of new blocks. Block generation is a computationally light task and therefore running a node does not require neither specialised equipment nor storage. The intention is for normal mobile devices to be able to run as a node within the network. The non-deterministic nature of the bidding process makes it so that even nodes bidding the minimum amount of DUSK have a fair chance to win the block generation sortition lottery.

Provisioners - These are nodes that have committed a certain minimum stake to the Dusk Network and take care of more network intensive tasks such as block verification, voting, and notarization (VVN operations). These types of nodes are non-transactional

The intention is to create an economy where nodes compete for block rewards, while Provisioners earn a steady ROI.