A system for advertising on a Peer-to-Peer network detects a search request of a node in a Peer-to-Peer network. After detecting a search request, the system prepares an unsolicited response (e.g., advertisement) to the search request of the node. Once the unsolicited response is prepared, the system sends the unsolicited response to the node. For example, a Peer-to-Peer network node issues a search request and a system prepares an advertisement (e.g., an unsolicited response). After preparing the advertisement, the system sends the advertisement to the Peer-to-Peer network node that issued the search request. The process of sending advertisements can be made to each node issuing a search request without discrimination. In one example, the system detects a search request of a node in a Peer-to-Peer network; prepares an advertisement in response to the search request of the node based on a predetermined search criteria; and sends the advertisement to the node for advertising on the Peer-to-Peer network.