This is repeated until the resource is found or all the nodes have been contacted, or perhaps a network-imposed hop limit is reached.
Query flooding is simple to implement and is practical for small networks with few requests.
Thus, a larger network would generate far more traffic per node than a smaller one, making it inherently unscalable.
The query routing specification explains how the ideas of the original research are implemented.
Searches are performed by other mechanisms, such as locating torrent files indexed on a website.