Each of the responses may include, for example, information identifying the content satisfying the query and information such as an IP address, URL, or some other network identifier enabling the L1 peer node 12-1 to obtain the content from the corresponding one of the L1 peer nodes 12-2 through 12-A and 14-1 through 14-B, the L2 peer node 16-C, and the L3 peer node 18.